The diagram shows a track composed of a rectangle with a semicircle on each end. The area of the rectangle is 10,500 square meters. What is the
perimeter of the track? Use 3.14 for it.

answer: i don't understand. what are the options

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