grandma ploan to finance her grandchilds college education she has 50,000 to invest use a long range investment pln ,cd,saving bond etc. the plan is to earn compound interest.the principal is(p)50,000 interest rate is (r)3.60years for investment is(6)this is time state number compounding periods per year this is (N)futre valueas an exponenial function with time as the independent varible: f(t)=P(1+r/n)nt