The volume of a cylinder is 980pi in3. the radius is 7 in. what is its height?
a) 10 in
b) 140 in
c) 70 in
d) 20 in

D) 20 in

Step-by-step explanation:

The volume of a cylinder is given by

V = pi r^2 h  where r is the radius and h is the height

Substituting what we know

980 pi = pi (7)^2 h

Divide each side by pi

980 pi /pi= pi 49 h/pi

980 = 49h

Divide each side by 49

980/49 = 49h/49

20 =h

since both sides equal, there are infinitely many olutions.

the answer is c

step-by-step explanation: i took a test with this question on it