Verified answer

b.

FORMULA FOR VOLUME OF SPHERE is 4/3 pi r^3

4 / 3 X 3.14 X 10/2 X 10/2 X 10/2 = 523.3 ft ^3

ANSWER is b)

v=4/3pi,r to the power of 3 so

5*5*5=125

125*3.14=392.5

392.5*4/3=523.3

B

v = 4/3(pi)r^3

d = 2r so r = d/2 = 10/2 = 5

v = 4/3(3.14)(5^3) = 523.33 ft^3

4/3 * pi * (D/2)^3

4/3 * pi * D^3 * 1/8

4/24 * pi * D^3

1/6 * pi * D^3

1/6 * pi * 10^3

1/6 * pi * 1000

about 523.6 ft^3...hmm...