Suppose the average number of missed school days for students in public schools is 10.3 with a standard deviation of 2.0. We take a simple random sample of 249 public school students. What is the mean of this sampling distribution?

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

y= -2x+4, have a great day