How do you calculate surface area of a solid rectangular block measuring 2 cm in length, 4 cm wide and 6 cm long?

12.5 feet

step-by-step explanation:

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb

answer is  

d.

a circle

i got it down for you chief.