Question 426965
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b>
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