What is one number greater than -2 and less than -1

Sally deposited money into a savings account paying 4% simple interest per year.the first year,she earn $75 in interest.how much interest will she earn during the following year?

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.

The average car sold from dealership a is 25,700. if the salesperson receives 1.5% commission on the price of the car, how much commission is made on a average per car sold