cynthia invests some money in a bank which pays 5% compound interest each year. she wants it to be worth other $8000 at the end of 3 years. what is the smallst pound to the nearst $ can she invest?
$8000 = A ( 1.05)^3 where A is the amount we seek
Divide both sides by (1.05)^3
8000/(1.05)^3 ≈ $6910.70
+40 
