Question

1.) A balloon has a circumference of 16 cm. Use the circumference to approximate the surface area of the balloon to the nearest square.

My answer: 81cm^2. Is that correct?

2.) Find the volume of the sphere shown. Give each answer rounded to the nearest cubic unit.
http://assets.openstudy.com/updates/attachments/510322e2e4b03186c3f90942-khart-1359160103056-problem7.jpg

my answer: 4,189 mm^3. Is that correct?

3.) Determine whether the two figures are similar. If so, give the similarity ratio of the smaller figure to the larger figure.

Answer 1

http://assets.openstudy.com/updates/attachments/510322e2e4b03186c3f90942-khart-1359160102864-problem8.jpg

Answer 2

My answer: yes 1:3

Answer 3

Nice pic

Answer 4

thx XD

Answer 5

@welshfella you have corrected my work before

Answer 6

@Astrophysics @acxbox22 I just need my work CORRECTED

Answer 7

sorry gtg right now

Answer 8

Well...okay

Answer 9

I just need my work CORRECTED @Elsa213 @JoannaBlackwelder

Answer 10

I just need my work CORRECTED @ganeshie8

Answer 11

Elsa, I hope you wont leave.

Answer 12

For all of them?

Answer 13

yeeeess

Answer 14

Thank you for checking.