What is the factored form of b^3 - 1000 A. (b + 10)(b^2 -10b + 100)
B. (b - 10)(b^2 + 10b + 100)
C. (b - 10)(10b^2 + b + 100)
D. (b + 10)(10b^2 - b + 100)

B

Step-by-step explanation:

a³ - b³ = (a -b)(a² +ab +b²)

b³ - 1000 = b³ - 10³

                = (b - 10)(b² + 10b +10²)

               = (b -10)(b² + 10b + 100)

All you have to do in this problem, is know what s is, we find this by using the equation: s+8+2s+s=84 (we use 84 because it is the perimeter of the triangle.

Perimeter= 84 inches

1st side: 19

2nd side: 19+8=27

3rd side: 2*19=38