For

the volume of a cylinder is 252π cm3 and its height is 7 cm.

36

80

16

6

r = 6cm

Step-by-step explanation:

The formula for volume of a cylinder is

V = pi r^2h

where r is the radius and h is the height

We know the volume and the height

252 pi = pi * r^2  *7

Divide each side by pi

252 pi/pi = pi/pi * r^2  *7

252 = r^2 *7

Divide each side by 7

252/7 = r^2 *7/7

36 = r^2

Take the square root of each side

sqrt(36) = sqrt(r^2)

6 = r

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8