Question

If a right circular cone must have a volume of 12 cubic meters, then a function that gives the possible radii as a function of the height is: (The volume of a right circular cone is given by the formula V=1/3*pi*r^2*h
A. r=12/(pi*h)
B. r=+/- sqrt((36/(pi*h))
C. r= sqrt((36/pi*h)
D. h=+/- sqrt((36/(pi*r^2)
E. r=36/(pi*h)

Answer 1

radius must of course be positive
so its not B or D

Answer 2

you need to divide both sides of formula for V by 1/3 * pi*h and take positive square root

Answer 3

The answer is then C?

Answer 4

yes

Answer 5

Thanks!