Which of the following choices is closest to the area of the circle!
d = 7 cm

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.

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