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人気のある Word Problems >

A person invests 3500 dollars in a bank. The bank pays 6.25% interest compounded annually. To the nearest tenth of a year, how long must the person leave the money in the bank until it reaches 8700 dollars?

解

A p erso n in v es t s 3500 d o ll a rs in a bank . T h e bank p a ys 6.25% in t eres t co m p o u n d e d ann u a ll y . T o t h e n e a res t t e n t h o f a ye a r, h o w l o n g m u s t t h e p erso n l e a v e t h e m o n ey in t h e bank u n t i l i t re a c h es 8700 d o ll a rs ?

解

Time : 15.02

解答ステップ

Translate the problem into an equation:

8700 = 3500 (1 + \frac{0.0625}{1})^{1 \cdot t}

t

を解く

8700 = 3500 (1 + \frac{0.0625}{1})^{1 \cdot t} : t = 15.02

Time : 15.02

人気の例

Danielle is planning to invest 3000 into a savings account which compounds interest yearly.What interest rate per annum is needed for her investment to reach 6000 after 6 years?Find the final amount of money in an account if 2, 200 is deposited at 5.5 % interest compounded weekly and the money is left for 9 years. Round the answer to 2 decimal places.The sum of a number times 10 and 23 is less than-26.12 less than the quotient of a number and 4 Deshaun needs 18464 for a future project. He can invest 4000 now at an annual rate of 8% , compounded semiannually. Assuming that no withdrawals are made, how long will it take for him to have enough money for his project?