The area of a circle that's 64 pi square inches long. What's the radius ?

Answers

Answer 1

Answer: the area of anything cannot be any amount of square inches 'long'
long is 1 dimentional while area is 2 dimentional

anyway
area=(pi)radius^2
64pi=area
therfor
64pi=(pi)radius^2
divide both sides by pi
64=radius^2
sqrt both sides
8=radius
8 inches

Answer 2

Answer: A=pi*r^2 sqrt64=8 in radius

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Instructions: Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar(s).Consider the functions f(x)=x^2+9x and g(x)=1/x.f(g(-1)) is g(f(1/2)) is
Plz help !!!!!!!!!! If correct I will give brainiest
Can u help me in this algebra problem??
Mario has a business selling muffins. Let x be the price of a muffin. Then, the profit P for Mario’s business is given by p(x)=-100x2+350x-150 Choose the inequality that shows the business will make a positive profit.

How to change 4.1 into a decimal?

Answers

Well you can't change 4.1 into a decimal because it's already a decimal with a decimal point included in it, so there's really no point of asking that question when you've already done it yourself! Just wanted to notify you on that point.

You can't change it to a decimal because it is already a decimal.

If a population roughly doubles in the course of 22 years, its growth rate would be close toC) 2.0
A) 1.5
D) 3.2
B) 1.2

Answers

Answer:

hmm you need help

Step-by-step explanation:

What is the slope for this graph?

Answers

slope = rise/run
slope for this graph = 6/4 = 3/2

At a zoo, the lion pen has a ring-shaped sidewalk around it. The outer edge of the sidewalk is a circle with a radius of 11 m. The inner edge of the sidewalk is a circle with a radius of 9 m. Find the exact area of the larger circle
Find the exact area of the smaller circle.
Write an expression to find the exact area of the sidewalk (shaded portion).
Find the approximate area of the sidewalk. Use 3.14 to approximate π.
Answer:
Find the exact area of the larger circle. Show your work. (1 point)
A= N x 11 2 A = n?

Find the exact area of the smaller circle. Show your work. (1 point)
A= n 9 2 A=n?

Write an expression to find the exact area of the sidewalk (shaded portion). Show your work. (2 points) 11 2 – 9 2 x n

Find the approximate area of the sidewalk. Use 3.14 to approximate π. Show your work. (1 point) 11 2 x 3.14 – 9 2 x 3.14=

Answers

Well first lets find area of the entire circle itself

We have the radius be 11.

Pie x radius^2 = A

11 squared is 121.

So we have:

Pie x 121 = area

Pie is 3.14.

The area of the entire circle is exactly 379.94 m.

Now lets put this off to side and solve the inner circle.

Same thing:

Radius of the inner circle is 9.

Pie x radius^2 = Area

9 squared is 81.

So now:
Pie x 81 = area

Pie is 3.14

3.14 x 81 = exactly 254.34.

The inner pen is exactly 254.34 m

So now knowing :

The whole circle is 379.94
And the inner circle is 254.34

We can subtract the inner circles area from the whole circle and get the area of the outer circle/sidewalk.

379.94 - 254.34 = 125.6

The outer circle/sidewalk is 125.6 m

With this info we can answer your questions.

The exact area of the larger circle is 379.94 m

The exact area of the inner circle is 254.34 m

Expression:
If
Large circle = L
Small circle = S
Sidewalk = W

An expression would be L - S = W

The sidewalk area is exactly 125.6 m

To show your work read what i did above and just show how i did Pie x radius = area.

Hope this helps!
Brainliest is always appreciated if you feel its deserved.

Two urns each contain green balls and blue balls. Urn I contains 4 green balls and 6 blue balls, and Urn II contains 6 green balls and 2 blue balls. A ball is drawn at random from each urn. What is the probability that both balls are blue?A. 2/51
B. 3/20
C.1/10
D.4/153

Answers

b- 3/20. first, add up the number of balls in each urn.
urn 1- 10
urn 2- 8
then, make a fraction where the numerator is the number of blue balls in the urn and the denominator is the total number of balls
urn 1- 6/10 (simplified to 3/5)
urn 2- 2/8 (simplified to 1/4)
finally, multiply your two probabilities and simplify
1/4*3/5=3/20

Inequality word problem

7 less than -2 times a number X is greater than or equal to 41

Answers

less than means minus so 7 less than means -7

-2 times a number x means -2 times x or -2x

is greater than or equal to means >

41=41

so
-7+-2x>41
-2x-7>41
add 7 to both sides
-2x>48
divide both sides by -2
remember to flip sign since divided by negative
x<-96

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