Question

Write a formula for the function and use the formula to find the indicated value of the function. A) The surface S of a cube as a function of the length of the cube's edge e; the surface area of edge length 5ft. B) the volume V of a sphere as a function of the sphere's radius r; the volume of the sphere of radius 3cm.

Answer 1

A )  S = 6 e²
e = 5 ft
S = 6 · 5² = 6 · 25 = 150 ft²
B ) V = 4 r² π
r = 3 cm
V = 4 · 3² π = 4 · 9 π = 36 π cm³