Find the circumference of a pizza if the diameter is 10 inches.
0.314 in.
3.14 in.
3.04 in.
31.4 in.
Answer: 31.4 in.
Step-by-step explanation:
We know that the circumference of the circle is given by :-
[tex]C=\pi d[/tex], where d is the diameter of the circle.
Given : The diameter of the pizza = 10 inches
Then the circumference of the pizza will be :-
[tex]C=\pi (10)[/tex]
We put the value of [tex]\pi =3.14[/tex], we get
[tex]C=3.14 (10)=31.4[/tex]
Hence, the circumference of a pizza is 31.4 in.
A video game that costs $30 is on sale for 25% off. What is the sale price?
$37.50
$5
$27.50
$22.50
A city’s population, P (in thousands), can be modeled by the equation P = 130( 1.03)^x where x is the number of years after January 1, 2000. For what value of x does the model predict that the population of the city will be approximately 170,000?
To find the value of x for which the model predicts a population of approximately 170,000, solve the equation P = 130(1.03)^x. Divide both sides by 130, take the logarithm of both sides, and solve for x. The approximate value of x is 9.855.
Explanation:To find the value of x for which the model predicts a population of approximately 170,000, we need to solve the equation:
170 = 130(1.03)x
To solve for x, we can start by dividing both sides of the equation by 130:
170/130 = (1.03)x
1.3077 = (1.03)x
Next, take the logarithm of both sides of the equation:
log(1.3077) = x * log(1.03)
Using a calculator, we can find that x is approximately 9.855.
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Firstly, we need to clarify that the population given in the question, 170,000, is represented in 'thousands' in the modelling equation. Therefore, for simplicity, it is referred to as '170' in the equation.
We know from the problem that the population model is:
P = 130 * (1.03 ^ x),
where P is the population (in thousands) and x is the number of years since the start point (January 1, 2000). Given that we're looking for the point in time where the population is approximately 170,000 (or '170' in the terms of the equation), we can set P = 170 and solve for x:
170 = 130 * (1.03 ^ x)
Solving an equation in terms of x with an exponent can be handled neatly with logarithms. You can isolate the variable by taking the natural log (ln) of both sides. So we can transform our equation like this:
ln(170 / 130) = ln(1.03 ^ x)
Next, we use the property of logarithms that says the log of a number raised to an exponent is equal to the exponent times the log of the number:
ln(170 / 130) = x * ln(1.03)
Solving for x gives:
x = ln(170 / 130) / ln(1.03)
Calculating the value gives x ≈ 9.075604092564975. However, since the population is generally reported on an annual basis, we round the value of x up to the nearest whole number. That gives us:
x_rounded ≈ 10 years.
So, according to the model, the city's population will reach approximately 170,000 around 10 years after January 1, 2000.
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Chelsea made 15 of the 28 recipes she downloaded from the Internet. What percent of the recipes did she make?
Final answer:
Chelsea made 15 out of 28 recipes she downloaded from the Internet, which translates to approximately 54% of the recipes when calculated using the percentage formula: (Part/Total) × 100.
Explanation:
To find out what percent of the recipes Chelsea made, we will use the formula for calculating the percentage:
Percentage = (Part/Total) × 100
Here, the part is the number of recipes she made, and the total is the number of recipes she downloaded. Chelsea made 15 recipes out of 28. So we set it up like this:
Percentage = (15/28) × 100
Solution:
Percentage = (15/28) × 100
Percentage = 0.5357... x 100
Percentage = 53.57...
When you round to the nearest whole number, Chelsea made approximately 54% of the recipes.
Chelsea made approximately 53.57% of the recipes from the Internet, totaling 15 out of 28 recipes.
To find the percentage of recipes Chelsea made, follow these steps:
Step 1: Calculate the fraction of recipes she made.
Fraction made = (Number of recipes made) / (Total number of recipes)
= 15 / 28
Step 2: Convert the fraction to a percentage.
Percentage = Fraction * 100
= (15 / 28) * 100
Step 3: Perform the calculation.
Percentage = (15 / 28) * 100
≈ 53.57%
So, Chelsea made approximately 53.57% of the recipes.
A positive integer is 47 more than 9 times another. their product is 18601860. find the two integers.
What is the simplified form of √ 2160x^8/60x^2
The correct answer I found is 6x³
David wants to buy a game system and his favorite game.The game costs $25 and is 1/5 of the price of the game system.How much does the game system cost?
multiply 25 by 5 = 125
the game system cost 125
As per linear equation, the game system costs $125.
What is a linear equation?"A linear equation is an equation in which the highest power of the variable is always 1."
Given, the cost of the game is $25.
The cost of of the game is [tex]\frac{1}{5}[/tex] of the price of the game system.
Therefore, the cost of the game system is
= 5 × cost of the game
= $(5 × 25)
= $125
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what is the surface area of a square pyramid with a base of 12cm and a slanted height of 8cm?
The length of a rectangle is twice its width. if the perimeter of the rectangle is 36 cm , find its area.
Help? Sampling
A toy bin has twenty toys in it, five of each type. Storm wants to know which type of toy he would pick if he pulled out one.
Which of the following would be the most appropriate sampling technique?
A. He could use a spinner with four equal-sized sections, one for each toy.
B. He could make a chart to show all of the toys that other people pulled out. <<?
C. He could use a spinner with five equal-sized sections, one for each toy.
D. He could use a random number generator with the total number of toys as the top number.
Answer:
Option (C) is correct choice.
Explanation:
The most appropriate sampling technique for Storm to determine which type of toy he would pick from the bin is option C. He could use a spinner with five equal-sized sections, one for each type of toy.
Option A (using a spinner with four equal-sized sections) does not accurately represent the distribution of toys in the bin, as there are five types of toys.
Option B (making a chart of toys that other people pulled out) relies on the data from others and does not involve Storm directly selecting a toy.
Option D (using a random number generator) is not as straightforward and intuitive as directly selecting a toy from the bin.
Therefore, option C provides Storm with a fair and simple method to randomly select one type of toy from the bin.
Factor k 2 + 13k + 12.
Answer:
The factors of the given polynomial are : (k + 1)(k + 12)
Step-by-step explanation:
The quadratic equation which is needed to be factorized is given as :
k² + 13k + 12
In order to factorize this, arrange 13k in such a way that the product of its factors equals to 12k² ⇒ 13k = 12k + k
⇒ k² + 13k + 12
⇒ k² + k + 12k + 12
⇒ k(k + 1) + 12(k + 1)
⇒ (k + 1)(k + 12)
Hence, The factors of the given polynomial are : (k + 1)(k + 12)
Helppppp! Which answer choice correctly describes the relationship between two of the lines in the figure?
Round to the nearest hundredth.
Malik solved this system of equations.
2x+4y=24
5x+y=15
As the first step, he decided to solve for x in the first equation because it has a small, even number for the coefficient. Jill told him there was a more efficient way. What reason can Jill give for her statement?
A.The variable y in the second equation has a coefficient of one so there will be fewer steps to the solution.
B. The variable x in the second equation has a coefficient of 5 so it will be easy to divide 15 by 5.
C. The variable y in the first equation is divisible by 2 so it will be the most efficient way to start.
D. The variable y in the first equation has a larger even number. When dividing by 4, the solution will be a smaller number.
The variable y in the second equation has a coefficient of one so there will be fewer steps to the solution.
System of equationsGiven the simultaneous equation
2x+4y=245x+y=15The best way to solve this kind of equation is by the substitution method. To do that in an easy way, you can locate which of the variables in the equations has a coefficient of 1.
From equation 2, we can see that the variable "y' has a coefficient of 1, hence the reason that Jill can give for her statement is that the variable y in the second equation has a coefficient of one so there will be fewer steps to the solution.
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In the figure, the horizontal lines are parallel and AB = BC = CD. If LM = 3 Find JM? A. 12 B. 6 C. 3 D. 9
The value of JM is 9, the correct option is D.
What are Parallel Lines?
The lines that always have a constant distance between them and never intersect each other are called Parallel Lines.
The slope of parallel lines is equal to each other.
The parallel lines, AM, BL, CK, DJ can be seen in the figure.
As the distance between AB = BC = CD is equal,
The parallel line runs at same distance from each other and so, the distance between LM= LK = KJ,
The value of LM is 3.
Then the value of JM = LM + KL + KJ
JM = 3 + 3 + 3
JM = 9 units.
Your question seems incomplete, the complete question is attached as an image with the answer.
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Eric plans to rent a Beach House for a week. He has a coupon for 20% off the daily base rate of $200. He will also have to pay an additional $20 a day for utilities. Which expression represents the situation. (d represents the number of days)
Answer: 180 d is the required expression.
Step-by-step explanation:
Since, He has a coupon for 20% off the daily base rate of $200.
Therefore, His daily base cost = 80 % of 200 = [tex]\frac{20\times 80}{100}[/tex] = $ 160
Additional cost he pay in a day = $20
Therefore, his total cost of one day = 160 + 20 = 180
Thus, his total cost in d days = 180 d
Which is the required expression.
Answer:
180d C)
Step-by-step explanation:
40 is 20 percent of 200, if you remove 40 from 200 you get 160. then add 20 and you have 180.
Find the cost of twelve $1,000 bonds at a quotation of 84.50.
what is the most efficient first step in the process to factor the trinomial 3x^3-24x^2+36x
the answer is factor out 3x on apex.
Answer:
Factor out 3x
Step-by-step explanation:
A P E X answer
An angle whose vertex is at the center of a circle is a middle angle of that circle.
A. True
B. False
An angle whose vertex is at the center of a circle is a middle angle of that circle.
This is false because there can be numerous angles in the center of a circle. Moreover, the angle whose vertex is at the center is called a central angle. The two endpoints of this angle and located at the circumference or outline of the circle and the vertex is located at the center of that circle.
Every day, about 140,000,000 plastic water bottles are bought in the United States. Each bottle is about 0.25 meters long, and the equator of the Earth is about 40,000,000 meters around.
How many times can the Earth's equator be circled by a line of plastic bottles used in the United States every day?
Answer:
0.875 times Earth's equator is circled by plastic bottles every day.
Step-by-step explanation:
Given: No of plastic water bottles every day = 140,000,000
Length of a bottle = 0.25 m
length of equator of earth = 40,000,000 m
To find: no times Earth's equator is circled by line of bottles every day
No of plastic water bottles every day = 140,000,000
Length of 1 plastic water bottle = 0.25m
⇒ Length of 140,000,000 plastic bottles = 0.25 × 140000000
= 35000000 m
No. of times Earth's Equator is circled by bottles = [tex]\frac{35000000}{400000000}[/tex]
= 0.875
Therefore, 0.875 times Earth's equator is circled by plastic bottles every day.
Answer:
0.875
Step-by-step explanation:
What is the area of the rectangle shown on the coordinate plane?
If f(x) = ∣(x2 − 8)∣, how many numbers in the interval 0 ≤ x ≤ 2.5 satisfy the conclusion of the mean value theorem?
First let us find the slope of the straight line formed when x1 = 0 to x2 = 2.5.
y = x^2 – 8
y1 = 0^2 – 8 = - 8
y2 = 2.5^2 – 8 = -1.75
The formula for finding the slope is:
m = (y2 – y1) / (x2 – x1)
m = (-1.75- (- 8)) / (2.5 – 0)
m = 2.5
The mean value theorem states that the slope must be 2.5 at least once between x1 = 0 to x2 = 2.5.
Taking the 1st derivative (slope) of the equation:
dy / dx = 2x
Since dy / dx = m = 2.5
2x = 2.5
x = 1.25
Therefore the answer is: One number at x = 1.25
Wendy wanted to understand whether students at her school were in favor of an extended school day. She surveyed some students and displayed the results in the table below:
In favor Opposed Undecided
Grade 9 4 7 7
Grade 10 9 11 5
Grade 11 12 13 5
Grade 12 10 5 12
If the principal randomly selects a student in grade 12 from this survey, what is the probability that the student is in favor of extending the school day?
Answers:
0.37
0.27
0.49
0.52
Answer:
0.37
Step-by-step explanation:
Janet wins the lottery and receives $100 the first year. In the following years, she receives $50 more each year. (That is, Janet receives $150 the second year, $200 the third year, and so on.) How much will Janet receive, in total, after 10 years?
A) $2,500
B) $3,250
C) $1,450
D) $1,500
Factor x2a2 + 3xa2 + 2a2
staircase of steps in a swimming pool has a vertical rise of 14 inches per step and a landing of 20 inches.
Cylindrical coordinates? Hi,
I am having problems with a homework question,
I am asked to sketch the solid by the given inequalities.
0 <= theta <= pi/2 and r <= z <= 2
How do I find r?
If possible please guide me to the answer instead of giving it to me. I need to know this stuff.
Thanks in advance for any help.
By how much does a^3 - 2a exceed a^2 + a - 6?
Answer
a³ - a² - 3a + 6
Explanation
The equation requires you to subtract the two expressions.
(a³ - 2a) - (a² + a - 6)
In such an expression we subtract the like term only.
(a³ - 2a) - (a² + a - 6) = a³ - 2a - a² - a + 6
= a³ - a² -2a - a + 6
= a³ - a² - 3a + 6
what is the smallest positive integer that is divisible by each of the integers from 3 to 7, inclusive
In an isosceles triangle the base angles are congruent. True False