What is the mean of the sample? 47.5, 39.2, 36.8, 32.8, 41, 42.6, 43.9, 43.9, 43.9, 43.3, 44.7, 37.2

A. 39.1
B. 39.9
C. 40.1
D. 40.9

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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