I need help! I have a few questions that I need help with here they are.

1. What is the exact volume of the cylinder?http://static.k12.com/calms_media/media/1422500_1423000/1422965/1/a0905a2a12c93f8e242271e26bee421b81793e61/MS_PA_131002_171324.jpg

1. answer choices

A. 32pi in3
B. 64pi in3
C. 128pi in3
D.512pi in3

Question

I need help! I have a few questions that I need help with here they are.

1. What is the exact volume of the cylinder?http://static.k12.com/calms_media/media/1422500_1423000/1422965/1/a0905a2a12c93f8e242271e26bee421b81793e61/MS_PA_131002_171324.jpg

1. answer choices 

 A. 32pi in3
B. 64pi in3
C. 128pi in3
D.512pi in3

anonymous · Answer

2. A cylinder has a radius of 12 m and a height of 9 m. What is the exact volume of the cylinder?

anonymous · Answer

3. What is the exact volume of the cylinder? http://lv.k12.com/mediaFiles/Ninth_Grade/Math/Unit17866/Lesson69394/VHS_PA_S2_05_L204_L304_LQ_Q3.gif 3. answer choices A. 5760π in3 B. 2880π in3 C. 480π in3 D. 240π in3

solomonzelman · Answer

Can you find the area of the circle ? Multiply the area times height.

anonymous · Answer

ok, on question 1 I got B. 64

solomonzelman · Answer

No you are a little off.

The area is give by the formula,  A=π r²   . So in your case
A = π 4²  = 16π

Multiply 16π times the height (which is 8)

anonymous · Answer

is it 128?