# area and volume

posted by
**lilman** on
.

A balloon has a circumference of 22in. Use the circumference to approximate the surface area of the balloon to the nearset square inch.

possible answers;

154in^2

616in^2

1,521in^2

484in^2

Find the volume of the square pyramid.Round to nearest tenth if necessary.

The pyramid has a base of 24ft. and height of 15ft.

possible answers;

5,184ft^3

1,728ft^3

192ft^3

2,592ft^3

These are the only two problems I haven't been able to figure out. Would someone please help?