Question

Please help!

Question is below worth 12pts

Answer 1

Number 8: The medium pizza is 19 inches bigger than the personal sized.

Number 9: The window will take up about 37.7 feet.

Explanation:

For number 8, you want to multiply the 16 inches by pi, and you would get an estimate of 50. Then you do the same thing for ten inches and you get an estimate of 31. Subtract the two estimates and you will get 19. Therefore, with the rounded up to a whole number estimate, the medium sized pizza is 19 inches bigger than the personal sized one.

For number 9, you want to multiply that radius, which is 6, by two to get your diameter. Then you want to multiply that to get your circumference, which would be a rounded up to the tenth place estimate of 37.7 feet.

I hope all of this helps you!

Answer 2

8. 19 in.

9.
`113\ ft^2`

Explanation:

• Circumference of a circle: C = 2*π*r
• 22/7 or π = 3.14
• r (radius) = d/2

8a. medium-sized pizza

d/2 = 2

r = 16/2 = 8 in.

C = 2*π*r

C = 2*3.14*8

C = 16*3.14

C = 50.24 in.

8b. personal-sized pizza

d/2 = 2

r = 10/2 = 5 in.

C = 2*π*r

C = 2*3.14*5

C = 10*3.14

C = 31.4 in.

50.24 in. - 31.4 in = 18.84 in.

19 in. (rounded to the nearest whole number) <== final answer

9. Area of a circle:
`\pi r^2`

A =
`3.14* 6^2`

A = 3.14 * 36

A =
`113.04\ ft^2`

A =
`113\ ft^2` (rounded to the nearest tenth) <== final answer

Hope this helps!