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sveticcg [70]
3 years ago
14

Suppose you have $1,950 in your savings account at the end of a certain period of time. You invested $1,700 at a 6.88% simple an

nual interest rate. How long, in years, did you invest your money? State your result to the nearest hundredth of a year.
Mathematics
1 answer:
Licemer1 [7]3 years ago
5 0

Answer:

He invest for 2 years.

Step-by-step explanation:

Given : Suppose you have $1,950 in your savings account at the end of a certain period of time. You invested $1,700 at a 6.88% simple annual interest rate.

To find : How long, in years, did you invest your money?

Solution :

Applying simple interest formula,

A=P(1+r)^t

Where, A is the amount A=$1950

P is the principal P=$1700

r is the interest rate r=6.88%=0.0688

t is the time

Substitute the values in the formula,

1950=1700(1+0.0688)^t

\frac{1950}{1700}=(1.0688)^t

1.147=(1.0688)^t

Taking log both side,

\log(1.147)=\log ((1.0688)^t)

Applying logarithmic formula, \log a^x=x\log a

\log(1.147)=t\log (1.0688)

t=\frac{\log(1.147)}{\log (1.0688)}

t=2.06

Approximately, He invest for 2 years.

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