Answer:
1,221,759.
Step-by-step explanation:
This is the number of combinations of 5 from 45.
This = 45! / 40! 5!
= 1,221,759.
Answer:
1,221,759
Step-by-step explanation:
You've probably heard of Albert Einstein's formula regarding the speed of light: E = mc2. While this is an important formula that you will use throughout your academic career, it is not a formula you apply in your daily life. Describe some common or unique formulas that you use in your life. I DIDNT GET THE FULL ANSWER ON some unique formlas
Answer:
1. The Pythagoras theorem
Hypotenuse^2 = base^2 + perpendicular^2
2. Formula for calculating speed
Speed = Distance Time
3. Areas
Rectangle = length * width
Square = side^2
4. Profit and loss formulas
Step-by-step explanation:
Final answer:
Einstein's second postulate on the constant speed of light in a vacuum led to the famous equation [tex]E = mc^2,[/tex] demonstrating mass-energy equivalence. Although not commonly used in everyday life, other practical formulas impact daily activities such as finance, medicine, and cooking.
Explanation:
The second postulate upon which Albert Einstein based his theory of special relativity is related to the speed of light. This principle states that light travels at a constant speed of [tex]c = 3.00 imes 10^8 m/s[/tex] in a vacuum and does not depend on the frame of reference from which it is observed. This postulate led to one of the most renowned equations in physics, [tex]E = mc^2[/tex], which describes the relationship between energy (E), mass (m), and the speed of light (c). In this equation, E represents the energy equivalent of a certain mass (m) when it is converted into energy, revealing the profound concept that mass and energy are interchangeable.
While [tex]E = mc^2[/tex] is a groundbreaking equation in theoretical physics, it is not commonly applied in everyday situations. However, there are many other formulas that are routinely used in daily life. Examples include calculations for simple interest in finance, dose calculations in medicine, and recipes in cooking that require proportional adjustments. These formulas help us to navigate various practical aspects of our day-to-day activities.
The overhead reach distances of adult females are normally distributed with a mean of 200 cm200 cm and a standard deviation of 8 cm8 cm. a. Find the probability that an individual distance is greater than 209.30209.30 cm. b. Find the probability that the mean for 1515 randomly selected distances is greater than 198.20 cm.198.20 cm. c. Why can the normal distribution be used in part (b), even though the sample size does not exceed 30?
Answer:
A) 0.123; B) 0.8078; C) Because the population is normally distributed.
Step-by-step explanation:
For part A,
We first calculate the z-score, which tells us how many standard deviations from the mean our score is.
Since we are finding the z-score of an individual score and not a sample, we use the formula
[tex]z=\frac{X-\mu}{\sigma}[/tex]
Our score, X, is 209.3; our mean, μ, is 200; and our standard deviation, σ, is σ. This gives us
[tex]z=\frac{209.3-200}{8}=\frac{9.3}{8}=1.1625[/tex]
We look this value up in a z-table. However, we must round it to the nearest hundredth first; this is 1.16. From a z-table, we get that the area under the curve to the left of, or less than or equal to, this score is 0.8770.
However we want the probability that the value is greater than this; this means we subtract our found probability from 1:
1-0.8770 = 0.123
For part B,
Again we first calculate the z-score. However this time we are finding the probability of a mean of a sample rather than an individual score; this means we use the formula
[tex]z=\frac{\bar{X}-\mu}{\sigma\div \sqrt{n}}[/tex]
Our X is 198.20; our μ is still 200, and our σ is still 8; our value of n is our sample size, 15:
[tex]z=\frac{198.20-200}{8\div \sqrt{15}}=\frac{-1.8}{2.0656}=-0.87[/tex]
Looking up this value in a z-table, we get 0.1922.
However, we want the probability that the area, or probability, is greater than this; so we subtract from 1:
1-0.1922 = 0.8078
For part C,
When a population is normally distributed, this means that a sample taken from this population will also be normal; this means we can use the normal distribution.
A rectangle has vertices at (-1, 6), (-1, -2), (3, 6), and (3,-2). What is the area of the rectangle?
Answer:
32 units²
Step-by-step explanation:
From point 1 to point 2, the y values change by 8 units while the x values stay the same. This side of the rectangle has a length of 8
From point 1 to point 3, the x values change by 4 units while the y values stay the same. This side of the polygon has a length of 4
The area of the rectangle is 8x4 = 32 units²
Answer:
32 square units
Step-by-step explanation:
A rectangle has vertices at (-1, 6), (-1, -2), (3, 6), and (3,-2)
Area of a rectangle = length times width
LEts find the distance between (-1, 6) and (3, 6)
Apply distance formula
[tex]D= \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex]
[tex]D= \sqrt{(3+1)^2+(6-6)^2}=\sqrt(16)= 4[/tex]
LEts find the distance between (-1, 6), (-1, -2)
[tex]D= \sqrt{(-1+1)^2+(-2-6)^2}=\sqrt(64)= 8[/tex]
Area of the rectangle = 4 times 8= 32 square units
Bobby gets 5.5% commission on the cost of each vehicle he sells. What is his commission if he sells a truck for $32,459 ?
$98.19
$1,785.25
$1,073.02
$3,245.90
The answer should be B: $1,785.25
Answer:
$1785.245
Step-by-step explanation:
Cost of truck = $32,459
We are given that Bobby gets 5.5% commission on the cost of each vehicle he sells.
So, Commission = [tex]\frac{5.5}{100} \times 32459[/tex]
Commission = [tex]1785.245[/tex]
Hence his commission if he sells a truck for $32,459 is $1785.245
Determine whether the value is a discrete random variable, continuous random variable, or not a random variable. a. The amount of snowfall in December in City A b. The number of bald eagles in a country c. The gender of college students d. The number of statistics students now reading a book e. The number of people with blood type A in a random sample of 18 people f. The number of points scored during a basketball game
Answer:
a) a continuous random variable; b) a discrete random variable; c) not a random variable; d) a discrete random variable; e) a discrete random variable; f) a discrete random variable
Step-by-step explanation:
A continuous random variable is one that can take multiple values between whole number values; for instance, fractions and decimals. Snowfall is a continuous random variable.
A discrete random variable is one that can only take whole number values. The number of bald eagles, the number of students reading a book, the number of people with blood type A, and the number of points scored in a basketball game are discrete random variables.
Gender of students is not a numerical value; this is not a random variable.
Here, we are required to determine whether the value a list of data sets are, discrete random variable, continuous random variable, or not a random variable.
Options B, D, E and F are examples of discrete random variable values.Option A is an example of a continuous random variable value.Option C is an example of a non-random variable value.First, it is important to know the characteristics of each type of value as follows;
A discrete random variable is one which usually (although not necessarily) are counts. The statement above means they may take on only a countable number of distinct values such as 0,1,2,3, and on. Put simply, they can take only a finite number of distinct values. Distinct in this case means whole number values. Examples are as follows;The number of bald eagles in a countryThe number of statistics students now reading a bookThe number of people with blood type A in a random sample of 18 peopleThe number of points scored during a basketball game
2. A continuous random variable is one which has an infinite number of possible values. This means that the value of a continuous variable is usually associated with fractions of whole numbers, i.e continuous random variables are used majorly for measurements such as length, height and so on. An example from the question above is;
The amount of snowfall in December in City3. A non-random variable is one whose values are definite. An example from above is;
The gender of college studentsRead more:
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Due: Monday
On Ellipses - Pre Calc
25. Step-by-step explanation:
[tex]\text{The general form of an ellipse is:}\dfrac{(x-h)^2}{a^2}+\dfrac{(y-k)^2}{b^2}=1\\\\\bullet \text{(h, k) is the Center}\\\bullet \text{a is the radius of x}\\\bullet \text{b is the radius of y}\\\bullet \text{the largest value between a and b is the major}\\\bullet \text{the smallest value between a and b is the minor}\\\bullet \text{the vertices are the (h, k) value plus the major (a or b) value}\\\bullet \text{the co-vertices are the (h, k) value plus the minor (a or b) value}\\\bullet \text{Length is the diameter}=2r\\[/tex]
[tex]\dfrac{x^2}{16}+\dfrac{y^2}{25}=1\quad \text{can be rewritten as}\ \dfrac{(x-0)^2}{4^2}+\dfrac{(y-0)^2}{5^2}=1\\\\\bullet (h, k)=(0,0)\\\bullet a=4\\\bullet b=5\\\bullet \text{b is the largest value so: b is the major and a is the minor}\\\bullet \text{Vertices are }(0, 0+5)\ and\ (0, 0-5)\implies (0, 5)\ and\ (0, -5)\\\bullet \text{Co-vertices are }(0+4, 0)\ and\ (0-4, 0)\implies (4,0)\ and\ (-4,0)\\\bullet \text{Length of major is }2b:2(5)=10\\\bullet \text{Length of minor is }2a:2(4)=8[/tex]
To find the foci, first we must find the length of the foci using the formula:
[tex](r_{major})^2-(r_{minor})^2=c^2[/tex]
Then add the c-value to the h (or k)-value that represents the major.
b² - a² = c²
25 - 16 = c²
9 = c²
±3 = c
The center is (0, 0) and the major is the y-value so the foci is:
(0, 0+3) and (0, 0-3) ⇒ (0, 3) and (0, -3)
26. Answers
Follow the same steps as #25:
Center: (0, 0)
Vertices (7, 0) and (-7, 0)
Co-vertices: (0, 3) and (0, -3)
foci: (2√10, 0) and (-2√10, 0)
length of major: 14
length of minor: 6
cos 2x = ____
Check all that apply.
Answer:
see below
Step-by-step explanation:
The double angle formulas for trig functions are generally based on the sum of angle formulas, where the two angles are equal.
cos(a+b) = cos(a)cos(b) -sin(a)sin(b)
When a=b=x, then ...
cos(2x) = cos(x)² -sin(x)²
The Pythagorean identity can be used to substitute for either of the squares:
cos(2x) = (1 -sin(x)²) -sin(x)²
cos(2x) = 1 - 2sin(x)²
or
cos(2x) = cos(x)² -(1 -cos(x)²)
cos(2x) = 2cos(x)² - 1
The correct representations of the identity cos2x from the provided options are A (1 - 2sin²x), B (2sin²x - 1), and D (cos²x - sin²x). The Option C (sin²x - cos²x) is not correct. Therefore, option A,B and D are correct
Explanation:The question is asking for various forms of the identity cos2x, where x is an angle.
From the given options, A, B, and D are correct.
We know that cos2x can be represented in three possible ways: 1 - 2sin²x (Option A), 2cos²x - 1 (not provided in the options), and 2sin²x - 1 (Option B).
Thus, the correct options are A (1-2sin²x) and B (2sin²x - 1). Option D (cos²x - sin²x) is another equivalent form of cos2x based on the identity cos²x + sin²x = 1 (provided as Reference 7). Option C (sin²x - cos²x) is not a formula for cos2x so it's incorrect.
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The correct statement is written below:
cos2x=____. Check all that apply.
A. 1-2sin^2 x.
B. 2sin^2 x-1.
C. sin^2 x-cos^2 x.
D. cos^2 x-sin^2 x
Ms.Beard bought 10 acres of land she plans to divide the land into smaller slots that are each 1/20 of an acre how many smaller lots will she have
Answer:
200 smaller lots
Step-by-step explanation:
10 ÷ 1/20 = 200
The number of smaller lots should be 200
Given information:Ms.Beard bought 10 acres of land she plans to divide the land into smaller slots that are each 1/20 of an acre
Calculation of number of smaller lots:= 10 ÷ 1/20
= 200
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(1CQ) Determine whether the series -8/5+32/25-128/125+... is convergent or divergent.
Answer:
The series is convergent answer ⇒ (a)
Step-by-step explanation:
* The series is -8/5 + 32/25 + -128/125 + ........
- It is a geometric series with:
- first term a = -8/5 and common ratio r = 32/25 ÷ -8/5 = -4/5
* The difference between the convergent and divergent
in the geometric series is :
- If the geometric series is given by sum = a + a r + a r² + a r³ + ...
* Where a is the first term and r is the common ratio
* If |r| < 1 then the following geometric series converges to a / (1 - r).
- Where a/1 - r is the sum to infinity
* The proof is:
∵ S = a(1 - r^n)/(1 - r) ⇒ when IrI < 1 and n very large number
∴ r^n approach to zero
∴ S = a(1 - 0)/(1 - r) = a/(1 - r)
∴ S∞ = a/1 - r
* If |r| ≥ 1 then the above geometric series diverges
∵ r = -4/5
∴ IrI = 4/5
∴ IrI < 1
∴ The series is convergent
The ratio of successive terms leads to a limit of 4/5, which is less than 1. Hence, the series is convergent.
Convergence or Divergence of a Series
To determine whether the series -8/5+32/25-128/125+... is convergent or divergent, we observe the series' structure and apply the ratio test. For a series ∑a_n, the ratio test considers the limit L = lim (n→∞) |a_(n+1) / a_n|.
Let's compute this for our series:
[tex]a_n = (-1)^{(n+1)} * 8 * (4/5)^{(n-1)}[/tex]
Compute [tex]a_(n+1): a_(n+1) = (-1)^{(n+2)} * 8 * (4/5)^n[/tex]
Calculate |a_(n+1) / a_n| = [tex]|(-1)^{(n+2)} * 8 * (4/5)^n / (-1)^{(n+1)} * 8 * (4/5)^{(n-1)}| = |(4/5)|[/tex]
The limit L = |(4/5)| = 4/5 which is less than 1.
Since L < 1, by the ratio test, the series -8/5+32/25-128/125+... is convergent.
The probability of a type ii error is represented by the greek symbol, β.
a. True
b. False
The answer to your question is a. TRUE
Final answer:
The statement that the probability of a Type II error is represented by the Greek symbol β is true. The β symbol denotes the likelihood of failing to reject a false null hypothesis, while the power of a test (1-β) indicates the probability of accurately detecting a false null hypothesis.
Explanation:
The question is asking whether the statement 'The probability of a type ii error is represented by the greek symbol, β' is true or false. The correct answer is a. True. In statistics, a Type II error, which occurs when a false null hypothesis is not rejected, is indeed represented by the Greek letter β (beta). Therefore, the probability of committing a Type II error is denoted as β (beta). Conversely, a Type I error, symbolized by α (alpha), happens when the null hypothesis is incorrectly rejected. It is important to minimize both α and β as they represent the probabilities of these two types of errors. While α is often set by the researcher (commonly at 0.05), β is affected by factors such as effect size, sample size, and the chosen significance level α.
The power of a statistical test, defined as 1 - β, is the probability of correctly rejecting a false null hypothesis. A high statistical power is desirable as it indicates a lower chance of committing a Type II error. Estimating or calculating β directly can be complex, but understanding its role is crucial for interpreting the results of hypothesis testing.
The principal randomly selected six students to take an aptitude test. Their scores were: 87.4 86.9 89.9 78.3 75.1 70.6 Determine a 90% confidence interval for the mean score for all students. Assume the population is normally distributed. Give the lower limit of the interval as your answer below. Round to two decimal places. (Hint from class: Note that you will need to calculate the sample mean (xbar) and sample standard deviation (s) for this sample data in order to find the confidence interval endpoints. In class I referred to the formula for that -- and erroneously gave the formula for the sample variance instead of the sample standard deviation. The sample standard deviation would be the square root of the sample variance. Formulas for both can be found on the Test formula sheets posted on iLearn among other places.)
Answer:
79.5688 < µ < 83.1646
Step-by-step explanation:
Sample mean is the sum of all scores, divided the the total number of test takers. In this case, the sample mean is:
(87.4 + 86.9 + 89.9 + 78.3 + 75.1 + 70.6)/6 = 488.2/2 = 81.3667
The sample standard deviation is the square root of the sample variance. See attached photo 1 for calculation of these values...
The sample standard deviation is 3.1856
We need to make a 90% confidence interval for this data. Since n < 30, we will use a t-value. The degrees of freedom is always one less than the sample size so on the t-distribution chart, look under the column for Area under the curve = 0.10, and the row for 5. The t-value you should see is t = 2.015
See attached photo 2 for the construction of the confidence interval
One winter morning in Canada, the temperature at 8:00 was 1.5°C. From 8:00 to 11:00, the temperature increased by 0.7°C. From 11:00 to 2:00, it dropped 2.6°C, and from 2:00 to 5:00, it decreased by 0.9°C. What expression shows the temperature in °C at 5:00 p.M.?
Answer:
See below.
Step-by-step explanation:
Temperature at 5 pm = 1.5 + 0.7 - 2.6 - 0.9
(= -1.3 degrees C).
Answer:=1.5 + 0.7 - 2.6 - 0.9
Step-by-step explanation:
A water balloon is 5 feet above the ground when Sally launches it into the air. Use the quadratic equation 0 = -t2 + 4t + 5 to find how much time, t, it takes for the water balloon to reach the ground.
Answer:
2-sqrt14/2, 2+sqrt13/2.
Step-by-step explanation:
What you do is you have to do the quadratic equation like it says in the problem.
x= −b± sqrtb^2 −4ac /2a .
a=-2, b=4, c=5.
x=-4±sqrt(4)^2-4(-2)(5)/2(-2).
x=-4±sqrt16+40/-4.
x=-4±2sqrt14/-2.
2-sqrt14/2, 2+sqrt13/2. is your answer once you have done everything.
Answer:
5 seconds
Step-by-step explanation:
:0
Which of the following are measurements of the sides of a right triangle?
A. 25, 23, 7
B. 9, 6, 3
C. 18, 15, 4
D. none of the above
sides of right angle triangle follows Pythagoras theroem
which states
a^2 +b^2 = c^2
where a , b and c are sides of right angle triangle.
here none of options do not follow this.
so answer is option D
Answer:
D
Step-by-step explanation:
Which of the following are measurements of the sides of a right triangle?
Check c^2 = a^2 + b^2 where c is the largest of the 3 sides.
If c^2 = a^2+b^2 you have a right triangle. If it doesn't, you don't.
a beekeeper estimates that his population of bees will triple each year. currently he has 150 bees. write a function to represent the growth of the beekeepers population over time. use x to represent the number of bees
Answer:
[tex]x = 150 * 3^{y}[/tex]
Step-by-step explanation:
Let's start by creating the beginning of the data sample, knowing the population of bees triples each year.
Year 0 = 150
Year 1 = 450
Year 2 = 1350
Year 3 = 4050
Year 4 = 12150
If we look at the numbers, we see they are all divided by 150:
Year 0 = 150 / 150 = 1
Year 1 = 450 / 150 = 3
Year 2 = 1350 / 150 = 9
Year 3 = 4050 / 150 = 27
Year 4 = 12150 / 150 = 81
We then see the result of the division by 150 is in fact the table of multiplication by 3.
So, by inverting the operation, we can see the number of bees (x) for any given year starting from now is 150 times 3 at the power of the year (y).
Answer:
y=150(3)^x
Step-by-step explanation:
I had to do an assignment with the same question, this is the answer :)
The price of a car is usally £12,500 it is reduce to £11,625 what is the percentage of the reduction
12,500-11,625=875
1%=125
10%=1250
5%=625
625+125=750=6%
750+125=875=7%
so the percentage is 7%
Before 1918, approximately 60% of the wolves in a region were male, and 40% were female. However, cattle ranchers in this area have made a determined effort to exterminate wolves. From 1918 to the present, approximately 70% of wolves in the region are male, and 30% are female. Biologists suspect that male wolves are more likely than females to return to an area where the population has been greatly reduced. (Round your answers to three decimal places.) (a) Before 1918, in a random sample of 12 wolves spotted in the region, what is the probability that 9 or more were male? What is the probability that 9 or more were female? What is the probability that fewer than 6 were female? (b) For the period from 1918 to the present, in a random sample of 12 wolves spotted in the region, what is the probability that 9 or more were male? What is the probability that 9 or more were female? What is the probability that fewer than 6 were female?
Answer:
A) 0.2253, 0.0153; B) 0.4925, 0.0017
Step-by-step explanation:
This is a binomial distribution. This is because there are only two outcomes; each trial is independent of each other; and the outcomes are independent.
This means we use the formula
[tex]_nC_r\times p^r\times (1-p)^{n-r}[/tex]
For part A,
There are 12 wolves selected; this means n = 12. We want the probability that 9 or more are male; this makes r = 9, 10, 11 or 12. We will find each probability and add them together.
p, the probability of success, is 0.6 for the first question (males). This makes 1-p = 1-0.6 = 0.4. Together this gives us
[tex]_{12}C_9(0.6)^9(0.4)^3+_{12}C_{10}(0.6)^{10}(0.4)^2+_{12}C_{11}(0.6)^{11}(0.4)^1+_{12}C_{12}(0.6)^{12}(0.4)^0\\\\=220(0.6)^9(0.4)^3+66(0.6)^{10}(0.4)^2+12(0.6)^{11}(0.4)+1(0.6)^{12}(1)\\\\\\= 0.2253[/tex]
We now want the probability that 9 or more are female; this makes r = 9, 10, 11 or 12. p is now 0.4; this makes 1-p = 1-0.4 = 0.6. This gives us
[tex]_{12}C_9(0.4)^9(0.6)^3+_{12}C_{10}(0.4)^{10}(0.6)^2+_{12}C_{11}(0.4)^{11}(0.6)^1+_{12}C_{12}(0.4)^{12}(0.6)^0\\\\=220(0.4)^9(0.6)^3+66(0.4)^{10}(0.6)^2+12(0.4)^{11}(0.6)^1+1(0.4)^{12}(1)\\\\=0.0153[/tex]
For part B,
There are again 12 wolves selected, so n = 12. We want the probability in the first question that 9 or more are male; this makes r = 9, 10, 11 or 12. The probability of success is now 0.7, so 1-p = 1-0.7 = 0.3[tex]_{12}C_9(0.7)^9(0.3)^3+_{12}C_{10}(0.7)^{10}(0.3)^2+_{12}C_{11}(0.7)^{11}(0.3)^1+_{12}C_{12}(0.7)^{12}(0.3)^0\\\\=220(0.7)^9(0.3)^3+66(0.7)^{10}(0.3)^2+12(0.7)^{11}(0.3)^1+1(0.7)^{12}(0.3)^0\\\\= 0.4925[/tex]
For the second question, the probability of success is now 0.3 and 1-p = 1-0.3 = 0.7:
[tex]220(0.3)^9(0.7)^3+66(0.3)^{10}(0.7)^2+12(0.3)^{11}(0.7)^1+1(0.3)^{12}(0.7)^0\\\\=0.0017[/tex]
Probabilities are used to determine the outcomes of events.
Before 1918,
The probability of selecting 9 or more male wolves is 0.225The probability of selecting 9 or more female wolves is 0.015The probability of selecting lesser than 6 female wolves is 0.665Since 1918,
The probability of selecting 9 or more male wolves is 0.493The probability of selecting 9 or more female wolves is 0.002The probability of selecting lesser than 6 female wolves is 0.516The question is an illustration of binomial probability, where:
[tex]\mathbf{P(x) = ^nC_x \times p^x \times (1 - p)^{n -x}}[/tex]
(a i) Probability of selecting 9 or more wolves out of 12, before 1918
The given parameters are:
[tex]\mathbf{p = 0.60}[/tex] --- the probability of selecting a male wolf
So, we have:
[tex]\mathbf{P(x \ge 9) = P(9) + P(10) + P(11) + P(12)}[/tex]
Using [tex]\mathbf{P(x) = ^nC_x \times p^x \times (1 - p)^{n -x}}[/tex], we have:
[tex]\mathbf{P(x \ge 9) = ^{12}C_9 \times 0.6^9 \times (1 - 0.6)^{12-9} +..............+^{12}C_{12} \times 0.6^{12} \times (1 - 0.6)^{12-12} }[/tex]
[tex]\mathbf{P(x \ge 9) = 220 \times 0.00064497254 +..........+1 \times 0.00217678233}[/tex]
[tex]\mathbf{P(x \ge 9) =0.225 }[/tex]
(a ii) Probability of selecting 9 or more female wolves
The given parameters are:
[tex]\mathbf{p = 0.40}[/tex] --- the probability of selecting a female wolf
So, we have:
[tex]\mathbf{P(x \ge 9) = P(9) + P(10) + P(11) + P(12)}[/tex]
Using [tex]\mathbf{P(x) = ^nC_x \times p^x \times (1 - p)^{n -x}}[/tex], we have:
[tex]\mathbf{P(x \ge 9) = ^{12}C_9 \times 0.4^9 \times (1 - 0.4)^{12-9} +..............+^{12}C_{12} \times 0.4^{12} \times (1 - 0.4)^{12-12} }[/tex]
[tex]\mathbf{P(x \ge 9) = 220 \times 0.0000566231+..........+1 \times 0.00001677721}[/tex]
[tex]\mathbf{P(x \ge 9) =0.015 }[/tex]
(a ii) Probability of selecting fewer than 6 female wolves
The given parameters are:
[tex]\mathbf{p = 0.40}[/tex] --- the probability of selecting a female wolf
Using the complement rule, we have:
[tex]\mathbf{P(x < 6) = 1 - P(x \ge 6)}[/tex]
So, we have:
[tex]\mathbf{P(x < 6) = 1 - [P(6) + P(7) + P(8) + P(x \ge 9)]}[/tex]
Using [tex]\mathbf{P(x) = ^nC_x \times p^x \times (1 - p)^{n -x}}[/tex], we have:
[tex]\mathbf{P(x < 6) = 1 - [^{12}C_6 \times 0.4^6 \times 0.6^6 + ^{12}C_7 \times 0.4^7 \times 0.6^5 + ^{12}C_8 \times 0.4^8 \times 0.6^4 + P(x \ge 9)}[/tex][tex]\mathbf{P(x < 6) = 1 - [924 \times 0.00019110297 +........ + 0.0153]}[/tex]
[tex]\mathbf{P(x < 6) = 1 - [0.335]}[/tex]
[tex]\mathbf{P(x < 6) = 0.665}[/tex]
(b i) Probability of selecting 9 or more wolves out of 12, since 1918
The given parameters are:
[tex]\mathbf{p = 0.70}[/tex] --- the probability of selecting a male wolf
So, we have:
[tex]\mathbf{P(x \ge 9) = P(9) + P(10) + P(11) + P(12)}[/tex]
Using [tex]\mathbf{P(x) = ^nC_x \times p^x \times (1 - p)^{n -x}}[/tex], we have:
[tex]\mathbf{P(x \ge 9) = ^{12}C_9 \times 0.7^9 \times (1 - 0.7)^{12-9} +..............+^{12}C_{12} \times 0.7^{12} \times (1 - 0.7)^{12-12} }[/tex]
[tex]\mathbf{P(x \ge 9) = 220 \times 0.00108954738+..........+1 \times 0.0138412872}[/tex]
[tex]\mathbf{P(x \ge 9) =0.493 }[/tex]
(b ii) Probability of selecting 9 or more female wolves
The given parameters are:
[tex]\mathbf{p = 0.30}[/tex] --- the probability of selecting a female wolf
So, we have:
[tex]\mathbf{P(x \ge 9) = P(9) + P(10) + P(11) + P(12)}[/tex]
Using [tex]\mathbf{P(x) = ^nC_x \times p^x \times (1 - p)^{n -x}}[/tex], we have:
[tex]\mathbf{P(x \ge 9) = ^{12}C_9 \times 0.3^9 \times (1 - 0.3)^{12-9} +..............+^{12}C_{12} \times 0.3^{12} \times (1 - 0.3)^{12-12} }[/tex]
[tex]\mathbf{P(x \ge 9) = 220 \times 0.00000675126+..........+1 \times 5.31441e-7}[/tex]
[tex]\mathbf{P(x \ge 9) =0.002 }[/tex]
(b iii) Probability of selecting fewer than 6 female wolves
The given parameters are:
[tex]\mathbf{p = 0.40}[/tex] --- the probability of selecting a female wolf
Using the complement rule, we have:
[tex]\mathbf{P(x < 6) = 1 - P(x \ge 6)}[/tex]
So, we have:
[tex]\mathbf{P(x < 6) = 1 - [P(6) + P(7) + P(8) + P(x \ge 9)]}[/tex]
Using [tex]\mathbf{P(x) = ^nC_x \times p^x \times (1 - p)^{n -x}}[/tex], we have:
[tex]\mathbf{P(x < 6) = 1 - [^{12}C_6 \times 0.3^6 \times 0.7^6 + ^{12}C_7 \times 0.3^7 \times 0.7^5 + ^{12}C_8 \times 0.3^8 \times 0.7^4 + P(x \ge 9)}[/tex]
[tex]\mathbf{P(x < 6) = 1 - [924 \times 0.4^6 \times 0.7^6 + 792 \times 0.3^7 \times 0.7^5 + 495 \times 0.3^8 \times 0.7^4 + 0.002}[/tex]
[tex]\mathbf{P(x < 6) = 1 - [0.484]}[/tex]
[tex]\mathbf{P(x < 6) = 0.516}[/tex]
Read more about probabilities at:
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Given that 81^-3/4 = 3^n fins the value of n
Please help!!
Answer:
3^-3
Step-by-step explanation:
So first 81^-3/4 is cubing 81, finding the forth root, and then putting it on the denominator. Doing this you get 1/27.
Now you think, how do I get 3 to equal 27?
3^1 = 3
3^2 = 9
3^3 = 27
From here you just put a negative in front of the power, 3^-3, which puts the 27 on the bottom of the fraction, leaving you with 1/27, which is what we were trying to get.
Graph. y−2=23(x+4) Use the Line Tool and select two points to graph the equation. Use the slope and the point provided in the equation.
The graph of the equation y − 2 = 2⁄3(x + 4) is a blue line that passes through the points (0, 2) and (3, 4).
To graph the equation `y − 2 = 2⁄3(x + 4)` using the Line Tool and selecting two points, we can use the following steps:
1. Find the slope and y-intercept of the line.
The equation is already in slope-intercept form, y = mx + b, where m is the slope and b is the y-intercept. In this case, the slope is 2⁄3 and the y-intercept is 2.
2. Find a point on the line.
The y-intercept is always a point on the line, so we can use the point (0, 2) as our first point.
3. Use the slope to find another point on the line.
The slope tells us how much to move up or down and how much to move to the right to find another point on the line. In this case, the slope is 2⁄3, so we need to move up 2 units and to the right 3 units from our first point. This gives us the point (3, 4).
4. Select the two points in the Line Tool and draw the line.
Once we have selected the two points, we can draw the line by clicking and dragging the mouse.
Step 1: Find the slope and y-intercept of the line.
The equation `y − 2 = 2⁄3(x + 4)` is already in slope-intercept form, y = mx + b, where m is the slope and b is the y-intercept. In this case, the slope is 2⁄3 and the y-intercept is 2.
Step 2: Find a point on the line.
The y-intercept is always a point on the line, so we can use the point (0, 2) as our first point.
Step 3: Use the slope to find another point on the line.
The slope tells us how much to move up or down and how much to move to the right to find another point on the line. In this case, the slope is 2⁄3, so we need to move up 2 units and to the right 3 units from our first point. This gives us the point (3, 4).
Step 4: Select the two points in the Line Tool and draw the line.
Once we have selected the two points, we can draw the line by clicking and dragging the mouse.
Here is a diagram of the graph:
[Image of a graph of the equation y − 2 = 2⁄3(x + 4)]
The blue line is the graph of the equation. The red point is the point (0, 2) and the green point is the point (3, 4).
For such more questions on graph
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Jada is solving the equation shown below. -1/2 (x+4) = 6 Which is a possible first step to begin to simplify the equation? Check all that apply. Divide both sides of the equation by –2. Subtract 4 from both sides of the equation. Multiply both sides of the equation by –2. Distribute –2 over (x+4). Distribute -1/2 over (x=4). Multiply both sides of the equation by -1/2.
Answer:
Multiply both sides of the equation by -2
Distribute -1/2 over (x+4)
Step-by-step explanation:
we have
[tex]-\frac{1}{2}(x+4)=6[/tex]
Method 1
Multiply both sides of the equation by -2 ------> Step 1
[tex](x+4)=6*(-2)[/tex]
[tex](x+4)=-12[/tex]
Subtract 4 from both sides of the equation
[tex]x=-12-4=-16[/tex]
Method 2
Distribute -1/2 over (x+4)-------> Step 1
[tex]-\frac{1}{2}x-2=6[/tex]
Multiply both sides of the equation by -2
[tex]x+4=6(-2)[/tex]
[tex]x+4=-12[/tex]
Subtract 4 from both sides of the equation
[tex]x=-12-4=-16[/tex]
Answer:
⇒ Multiply both sides of the equation by -2
⇒ Distribute -1/2 over (x+4)
Those are the 2 answers.
At the grocery store Ayla buys1 1/3 pounds of ground turkey .Tasha buys 2 times as much ground turkey . How much ground turkey does Tasha buy
Answer:
2 2/3 lbs
Step-by-step explanation:
Convert Alya's mixed number to an improper fraction
3*1+1 = 4/3
multiply 4/3 times 2/1
4*2 = 8
3*1 = 3
8/3 - convert back to mixed number
8/3 = 2 2/3
Consider the characteristics of the graph. Which statement DOES NOT describe the data set
Where are the statements ?
Answer: The data is skewed right.
If (3, y) lies on the graph of y = -(2x), then y =
1/8
-6
-8
Answer:
The answer is -6.
Step-by-step explanation:
To find the value of y in (3, y), plug in 3 for x in y = -(2x) and solve for y.
y = -(2(3))
y = -6
y = -6, so the answer is -6.
Answer:
-8
Step-by-step explanation:
I think the equation you want is y=-(2^x) because if you meant what you put originally the first guy is right.
What you do is take 2^3 which equals 8 and then you have the negative left which gets you to -8. I probably explained this terribly and I am sorry.
which of the following are sets of discrete check all that apply
A{-3,6,9,17,24}
B(-10,29]
C(1,99)
D{1,3,5,7,...}
E{5,8}
Answer:
C(1,99) and E(5,8)
Step-by-step explanation:
Discrete data are numerical values that are distinct and outstanding mostly assigned from surveys by counting e.t.c
Thus, these numerical values cannot be negative as we can not count negative values.
the data can only take known exact values so it is not continuous. From the given sets of data the sets that satisfy the given guidelines are C(1,99) and E(5,8)
A rectangular room is 4 meters longer than it is wide, and its perimeter is 32 meters. Find the dimension of the room
Answer:
x=6
Step-by-step explanation:
2(x+4)+2x=32
2x+8+2x=32
4x+8=32
4x=24
x=6
The dimensions of the room are 6 meters in width and 10 meters in length.
The student's question pertains to finding the dimensions of a rectangular room based on given conditions: the room is 4 meters longer than it is wide and the perimeter is 32 meters. Let's denote the width of the room as w meters. Therefore, the length will be w + 4 meters. The perimeter of a rectangle is calculated by the formula
P = 2(length + width), which in this case is:
2(w + w + 4) = 32
4w + 8 = 32
4w = 32 - 8
4w = 24
w = 24 / 4
w = 6 meters
Now, since the length is 4 meters longer, it will be:
length = w + 4
length = 6 + 4 = 10 meters
Therefore, the dimensions of the room are 6 meters in width and 10 meters in length.
Fine the area. The figure is not drawn to scale.
Answer:
Step-by-step explanation:
Area = 7.6 × 3.7
Area = 28.12 cm²
I hope I helped you.
Answer:
[tex]28.12cm^2[/tex]
Step-by-step explanation:
The figure shown in the diagram is a parallelogram.
The area of a parallelogram is [tex]base \times height.[/tex].
The base of the parallelogram is 3.7cm
The height of the parallelogram is 7.6cm.
The area of the parallelogram
[tex]3.7\times 7.6=28.12cm^2[/tex]
The first choice is the correct answer
Solve the following equations for x:
a. 3x=30
b. 12x=12
c. 1=x−3
d. −24=4x
a.
3x = 30
x = 30/3
x = 10
b.
12x = 12
x = 12/12
x = 1
c.
1 = x-3
x = 1+3
x = 4
d.
-24 = 4x
x = -24/4
x = -6
HOPE THIS WILL HELP YOU
A salsa recipe uses green pepper onion and tomato in the extended ratio 2:5:9
Answer:
30
Step-by-step explanation:
The table below shows function r, which represents the total cost of a field trip to the science museum, in dollars, if n students return permission slips to attend. Which function represents the situation?
A.
r(n) = 15n + 55
B.
r(n) = 55n + 15
C.
r(n) = 30n - 20
D.
r(n) = 5n + 45
The answer has to be A) r(n) = 15n +55, as when n=0, r(n)=55 so the equation must end with +55.
Answer:
A. [tex]r(n)=15*n+55[/tex]
Step-by-step explanation
Since the value of n is given in the table as 0,5,15,30 and 35.So we will put the value of n in the given option starting from A.
Now putting the value of n as 0 in option A
we get [tex]r(n)=15*n+55[/tex]
[tex]r(0)=15*0+55\\r(0)=55[/tex]
Now putting the value of n as 5 in option A
we get [tex]r(n)=15*n+55[/tex]
[tex]r(5)=15*5+55\\r(0)=130[/tex]
Now putting the value of n as 15 in option A
we get [tex]r(n)=15*n+55[/tex]
[tex]r(15)=15*15+55\\r(0)=280[/tex]
Now putting the value of n as 30 in option A
we get [tex]r(n)=15*n+55[/tex]
[tex]r(30)=15*30+55\\r(0)=505[/tex]
Now putting the value of n as 35 in option A
we get [tex]r(n)=15*n+55[/tex]
[tex]r(35)=15*35+55\\r(0)=580[/tex]
After seeing the results of each value we see that option A is matching with all the given values. So the correct answer is A.
A value of a plot of land has increased by 10% in the past year. The new value of the plot is $46,200. What was the value of the plot last year.
Answer:
42,000 dollars was the value of the plot last year
Step-by-step explanation:
[tex]x*\frac{110}{100}=46200\\110x=4620000\\x=\frac{4620000}{110} \\x=42000[/tex]