For a college education, you plan to save up by starting early. What amount is expected at the end of 20 years if the rate is 4% yearly and you invest only $50 each month?​

Paul’s car is 18 feet long. he is making a model of his car that is 1/6 the actual size. what is the length of the model?

X– 4 = 12.5 can be written in words as

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.