6 years ago, Kurt won some money in the lottery and put it in a bank account that earns 7% interest compounded monthly. If Kurt currently has 200.00 in the bank account, how much interest has he earned?

解

6 ye a rs a g o, K u r t w o n so m e m o n ey in t h e l o tt ery an d p u t i t in a bank a cco u n t t ha t e a r n s 7% in t eres t co m p o u n d e d m o n t h l y . I f K u r t c u rre n tl y ha s 200.00 in t h e bank a cco u n t, h o w m u c h in t eres t ha s h e e a r n e d ?

Interest : 68.43

解答ステップ

Translate the problem into an equation:

200 = 131.56981 \dots + I

I

を解く

200 = 131.56981 \dots + I : I = 68.43

Interest : 68.43