The number of potato chips in a bag is normally distributed with a mean of 74 and a standard deviation of 4. Approximately what percent of bags contain between 62 and 86 potato chips?

Which of the following three dimensional figures has a circle as it’s base

Let x have probability generating function gx (s) and let un generating function u(s) of the sequence uo, u1, satisfies p(x > n). show that the (1- s)u(s) = 1 - gx(s), whenever the series defining these generating functions converge.

Two terms in a geometric sequence are a5=15 and a6=1 what is the recursive rule that describes the sequence?