Question

A manufacturer of shipping boxes has a box shaped like a cube. The side length is 5a + 4b. What is the volume of the box in terms of a and b?

A. a^3 + 3a^2b + 3ab^2 + b^3
B. 125a^3 + 300a^2b + 240ab^2 + b^3
C. 125a^3 - 300 a^2b + 240ab^2 + 64b^3
D. a^3 - 3a^2b + 3a^2b - b^3

Answer 1

Vol=l*w*h

Answer 2

Vol of cube = s^3

Answer 3

= (5a+4b)^3

Answer 4

I got B

Answer 5

Is that right?

Answer 6

I got 125 a^3+300 a^2 b+240 a b^2+64 b^3

Answer 7

V=side*side*side
V=(5a+4b)(5a+4b)(5a+4b)
V=(25a^2+40ab+16b^2)(5a+4b)
V=125a^3+300a^2b + 240ab^2 + b^3
B.