math
posted by yusuf .
A couple plans to invest money for the chld's education. What principle must the couple deposit when their child is born so that when she turns 18 she will have $50,000. Assume the money earns 6% compounded monthly.

Compute the amount in t years if a principal P is invested at an annual interest rate of r compounded as given. Round to the nearest cent.
P = $480, t = 4, r = 14% compounded quarterly.