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tamaranim1 [39]
3 years ago
11

interest rate is 7% and doubling time is 10.2 years. you have invested $5,000.00. in how many years will your money $40.000.00?

choose the best answer from the options below: a 40.8 years b 35.6 years c 30.2 years d 30.6 years
Business
1 answer:
LenKa [72]3 years ago
6 0
A = P (1 + I)^n
40000 = 5000 (1 + 0.07)^n
(1.07)^n = 40000/5000 = 8
ln(1.07)^n = ln8
nln1.07 = ln8
n = ln8/ln1.07 = 30.7...
The best answer is closest to (d) 30.6 years.
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