Hi

Note: In genernal, A= p(1+r/n) ^nt 

Compounded annually; A = p(1+r)^t  OR   log(A/p) /log(1+r) = t



a) $500 to grow to $1,039.50 invested at 5 percent compounded annually

   log(1039.50/500)/log(1.05) = 15yr



b) $35 to grow to $53.87 invested at 9 percent compounded annually

   log(53.87/35)/log(1.09) = t



c) $100 to grow to $298.60 invested at 20 percent compounded annually

   log(298.60/100)/log(1.20) = t



d) $53 to grow to $78.76 invested at 2 percent compounded annually 

   log(78.76/53)/log(1.02) = t





 

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