
The amount invested at each rate by writing and solving a system ofequations,if total annual interest earnedfrom a total of $12,000 invested in two funds paying thegiven rates of simple interest is 254$ at rates 1.75% and 2.25%.

Answer to Problem 28E
The amount invested at rate 1.75% is 3200 $ and at rate 2.25% is 8800 $
Explanation of Solution
Given info:
Total amount deposited = 12000 $
Total interest received = 254 $
Time = 1 Year
Formula used:
Simple interest
where is the P principal, r is the annual interestrate, and t is the time.
Calculation:
Let
We have
Total principal
Interest of rate 1
Interest of rate 2
Total interest
Substituting
And
The amount invested at rate 1.75% is 3200 $ and at rate 2.25% is 8800 $
Conclusion:
Thus,the amount invested at rate 1.75% is 3200 $ and at rate 2.25% is 8800 $
Chapter 7 Solutions
Precalculus with Limits
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