Find a particular solution to the differential equation using the method of undetermined coefficients. x prime prime (t )minus 2 x prime (t )plus x (t )x′′(t)−2x′(t)+x(t)equals=18 t squared e superscript t18t2et a solution is x subscript p baseline (t )xp(t)equals=nothing.

What numbers are included in the set of integers? what numbers are not included?

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if