Help me with this question
Find the critical value z subscript alpha divided by 2zα/2 that corresponds to the given confidence level
The critical value zα/2 that corresponds to a given confidence level can be found by subtracting the confidence level from 1, dividing by 2, and looking up this value in the Z-table. For a 90% confidence level, the corresponding zα/2 is approximately 1.645.
Explanation:To find the associated critical value zα/2 for a given confidence level, you would first subtract the confidence level from 1, then divide by 2. This will give you α/2. You would then look up this value in the Z-table to find the corresponding critical value of z. Now, let's consider an example.
Assume a confidence level of 90%. We subtract this from 1, which gives us 0.10, and then dividing by 2 gives us 0.05. Now we look up 0.05 in the Z-table, and find that the corresponding value of z is approximately 1.645. Therefore, the critical value zα/2 that corresponds to a 90% confidence level is approximately 1.645.
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There are approximately 45 hundred species of mammals on Earth and 2.8 x 10 to the 4 species of fish. What is the difference in the number of species?
This is SCIENTIFIC NOTATION
Answer:
23500
Step-by-step explanation:
We are given that
Number of species of mammals on earth=approximately 45 hundred=4500
Number of species of fish=[tex]2.8\times 10^4=2.8\times 10000=28000[/tex]
We have to find the difference between the number of species of mammals and fish.
In order to find the difference in the number of species we will subtract number of species mammals from the number of species of fish.
Difference=28000-4500=23500
Hence, the difference between the number of species of mammals and fish=23500
Answer:
23,500
Step-by-step explanation:
45 hundred = 45 × 100 = 4,500
2.8 × 10^4 = 28,000
28,000 - 4,500 = 23,500
which functons have graphs that are less steep than the graph of f(x)=2x^2
(select each correct answer)
h(x)= -2x^2
g(x)= -3x^2
m(x)= 3x^2
j(x)= -x^2
k(x)= x^2
Answer:
[tex]k(x) = x^{2} \\j(x) = -x^{2}[/tex]
Step-by-step explanation:
The slope has to be steep and the ones given above are all greater than 2 except for k(x) and j(x).
Maths question!!! The angles in triangle ABC are given in degrees, prove that AB=AC
Four cousins were born at two-year intervals. The sum of their ages is 36. How old are they?
Answer:
6, 8, 10, 12
Step-by-step explanation:
x + (x + 2) + (x + 4) + (x + 6) = 4x + 12.
4x + 12 = 36
24 = 4x
x = 6
Which equation is a point slope form equation for line AB?
A.y+1=3/2(x-1)
B.y+1=-3/2(x-1)
7x-y-17 = 0 Hope this helps!
the area of a triangle is 56.4cm and the base is 12cm.What is the height of the triangle?
area of a triangle = 1/2 base x height
56.4 = 1/2 x 12 x height
56.4 = 6 x height
height = 56.4 /6 = 9.4cm
Factor. x(3y−5)+3(3y−5)
Answer: The required factored form is [tex](x+3)(3y-5).[/tex]
Step-by-step explanation: We are given to factor the following polynomial :
[tex]P=x(3y-5)+3(3y-5)~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)[/tex]
We will be using the following factorization formula :
[tex]a(b+c)+d(b+c)=(a+d)(b+c).[/tex]
So, from expression (i), we get
[tex]P\\\=x(3y-5)+3(3y-5)\\\\=(x+3)(3y-5).[/tex]
Thus, the required factored form is [tex](x+3)(3y-5).[/tex]
An on-demand movie company charges $2.95 per movie plus a monthly fee of $39.95. Which expression represents the yearly cost for x movie rentals?
Answer:
2.95 x + 39.95 (12)
Hope this helps!!
The yearly cost for a student's movie rentals with a monthly subscription fee and a per-movie fee is expressed as $479.40 + $2.95x, where x is the number of movies rented.
Explanation:The yearly cost for x movie rentals from an on-demand movie company that charges a monthly fee and a per-movie fee can be represented by an algebraic expression. To find this expression, we need to account for both the monthly fee and the cost per movie.
The monthly fee is $39.95, so over one year, this fee would be 12 times $39.95.
For each movie rented, there is an additional charge of $2.95. If x movies are rented over a year, this cost is x times $2.95.
Combining these two costs gives us the total yearly cost:
Yearly Cost = (12 \(\times\) $39.95) + ($2.95 \(\times\) x)
This can be simplified to:
Yearly Cost = $479.40 + $2.95x
Kyle bought a 5 pound pumpkin for $2.60. How much did he pay per pound?
Henry drove 195 miles in 3 hours. How many miles per hour was he driving?
666-601=65
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it wont let me put it in without these words\
M and N are the acute angles of an isosceles right triangle.
Select the true statements.
cosM = sinM
cosM = cosN
cosM = tanN
sinN = cosM
tanM = tanN
Suppose that 18% of people have a dogdog, 34% of people have a cat, and 88% of people own both. What is the probability that someone owns a dog
or a cat
EASYYYYYYYYYYYYYYYYYYYYYYYYYYYY
If two sides of a triangle measure 12 and 7, which cannot be the perimeter of the triangle
38 cannot be the perimeter of the triangle.
What is Triangle Inequality Theorem?The sum of any two sides of a triangle is greater than or equal to the third side.
Given:
Two sides are 12 and 7.
Using Triangle Inequality Theorem, we have
In ΔABC,
AB + BC > CAAC + CB > BAAB + CA > BCSo,
12 + 7 > C
19 > C
C < 19
So, the third side should be less than 19.
Let us take maximum possible values,
C =18.999
Then, perimeter will be,
12 + 7 + 18.999 = 37.999
Hence, 38 cannot be the perimeter.
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Solve for x. x + 5 = 2x
The solution to the equation x + 5 = 2x is x = 5.
We have,
To solve the equation x + 5 = 2x, we want to find the value of x that makes the equation true.
We start by isolating the variable x on one side of the equation.
In this case, we can do that by subtracting x from both sides of the equation.
By subtracting x from both sides, we have:
x + 5 - x = 2x - x
The x term on the left side cancels out, leaving us with:
5 = x
This means that x is equal to 5, and substituting x = 5 back into the original equation gives us:
5 + 5 = 2(5)
10 = 10
The equation is true, confirming that x = 5 is the correct solution.
Therefore,
The solution to the equation x + 5 = 2x is x = 5.
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A circle has a diameter with endpoints at –3 + 18i and 7 – 6i. Which point is also on the circle?
Answer:
D. 14+11i
Step-by-step explanation:
Edge
Explain why the t-distribution has less spread as the number of degrees of freedom increases
16. 7⁄8 = ?⁄48 A. 42 B. 1 C. 13 D. 6
i cant answer it :(
7/8=0.875
42/48=0.875
Hope this helps!
If PS || QR what is the measure of angle RSP?
Option B is correct. The measure of m<RSP is 49 degrees
From the diagram shown
3x + 2x + 1 + 8y - 13 = 180
5x + 8y - 12 = 180
5x + 8y = 180 + 12
5x + 8y = 192 ................. 1
Also, since PQ is parallel to PS, hence;
5y +14 = 8y - 13 (alternate interior angle)
5y - 8y = -13 - 14
-3y = -27
y = 27/3
y = 9
Substitute y = 9 into equation 1
5x + 8y = 192
5x + 8(9) = 192
5x + 72 = 192
5x = 192 - 72
5x = 120
x = 120/5
x = 24
Get the measure of <RSP
m<RSP = 2x + 1
m<RSP = 2(24) + 1
m<RSP = 48 + 1
m<RSP = 49degrees
Hence the measure of m<RSP is 49 degrees
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If Leslie has a total monthly budget of $4000 and spends $500 on a car payment, What percentage of her monthly budget is dedicated to the car payment?
Answer:
12.5%
Step-by-step explanation:
We have been given that Leslie has a total monthly budget of $4000 and spends $500 on a car payment.
To find the percentage of her monthly budget is dedicated to the car payment, we will find 500 is what percent of 4000.
[tex]\text{Leslie's monthly budget dedicated to car payment}=\frac{500}{4000}\times 100\%[/tex]
[tex]\text{Leslie's monthly budget dedicated to car payment}=\frac{50}{4}\%[/tex]
[tex]\text{Leslie's monthly budget dedicated to car payment}=12.5\%[/tex]
Therefore, 12.5% of Leslie's monthly budget is dedicated to the car payment.
A graphics company charges $50 per hour to create a logo plus $250 for the ownership rights of the logo. A private contractor charges $75 per hour to develop a logo plus a $100 supply fee. Which equation can be solved to determine x, the number of hours after which the costs would be the same?
A. 50x + 250 = 75x + 100 is the correct answer
Answer:
A. 50x + 250 = 75x + 100
Step-by-step explanation:
edge 2022
The degree of the polynomial function f(x) is 4.
The roots of the equation f(x)=0 are −6 , −2 , 1, and 3.
Which graph could be the graph of f(x) ?
Answer:
option B
Step-by-step explanation:
The degree of the polynomial function f(x) is 4.
The roots of the equation f(x)=0 are [tex]−6 , −2 , 1,[/tex] and 3.
We are given with four roots. they are the x intercepts
x intercepts are [tex]−6 , −2 , 1,[/tex] and 3
The polynomial has degree 4, the polynomial goes up on both sides
We look at the graph that has x intercepts [tex]−6 , −2 , 1,[/tex] and 3 and both ends of the graph goes up
option B is correct
The graph that could be the graph of f(x) is;
The second graph which is the one at the top right
We are told that;
Degree of polynomial f(x) = 4; This means it has 4 roots
Roots of polynomial = -6, -2, -1 and 3
The roots of a polynomial simply means the values of x at which the function f(x) is equal to zero. This simply means the x- intercept is the root.
Thus, the x-intercept of the correct graph should be at;
x = -6; x = -2 ; x = -1 and x = 3
Looking at the given graphs, the only one that has its' x-intercepts at x = -6; x = -2 ; x = -1 and x = 3 is the second graph at the top right.
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The front of a tent is an equilateral triangle with the ratio of its base, b, to its height, h, given by b over h equal fraction numerator 2 over denominator square root of 3 end fraction. What equation can be used to find the tent's height?
What is the name of the relationship between ∠1 and ∠4 ? alternate exterior angles corresponding angles adjacent angles alternate interior angles Assessment menu bar
Answer:
coresponding angles buddy
Step-by-step explanation:
Katy buys 3 dvds every two weeks. how many dvd's will she buy in 14 weeks?
Answer:
21 dvds
Step-by-step explanation:
Set up a proportion in terms of DVDs to weeks and solve.
3/2 = x/14
(2)(x) = (3)(14)
2x = 42
x = 21
Therefore, Katy will buy 21 DVDs in 14 weeks.
is 8.23 a rational number?
Molly earns $8 per hour at her job. Last month, Molly worked for 45 hours. On her paycheck, Molly noticed that she paid $38.50 for federal income tax, $22.32 for Social Security, and $5.22 for Medicare. Molly's net income was
Molly's gross income is $360, and after subtracting her total deductions ($66.04), her net income is $293.96. This demonstrates the difference between gross and net income.
Explanation:To find Molly's net income, we will first need to calculate her gross earnings, and then subtract her deductions. Molly's gross earnings are her hourly wage multiplied by the number of hours she worked, so: $8/hr * 45 hours = $360.
Next, we add up Molly's deductions: $38.50 (federal tax) + $22.32 (Social Security) + $5.22 (Medicare) = $66.04.
Finally, to determine Molly's net income, we subtract her total deductions from her gross earnings: $360 - $66.04 = $293.96.
This example illustrates the concept of gross income versus net income. Gross income is the total amount earned before deductions, and net income is the amount left after deductions have been subtracted, which is the exact amount the employee receives in their paycheck.
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Factor 16x 4 – 81 completely. First factor each term. 16x 4 = (_____)2 81 = ___ 2 Then use a2 – b2 = (a – b)(a + b) twice. Show your work. 16x 4 – 81 =
The completely factored form of expression 16x⁴ - 81 is (4x² - 9)(4x² + 9).
To factor the expression 16x⁴ - 81 completely, let's first factor each term:
16x⁴ can be written as (4x²)² since (4x²)²= 16x⁴.
81 can be written as 9² since 9² = 81.
Now, we can rewrite the expression:
16x⁴ - 81 = (4x²)² - 9²
Using the formula a² - b² = (a - b)(a + b).
we can apply it twice to factor the expression further:
(4x² - 9)(4x² + 9)
Therefore, the completely factored form of 16x⁴ - 81 is (4x² - 9)(4x² + 9).
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