SOLUTION: Using I=PRT. Shawndra has $66,000 to invest. She decides to invest part at 6.5%and the rest at 4.5%. She figured she would make a total of $3,720 on her investments. How much did S

Question 1080081: Using I=PRT. Shawndra has $66,000 to invest. She decides to invest part at 6.5%and the rest at 4.5%. She figured she would make a total of $3,720 on her investments. How much did Shawndra invest at each rate?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!

Let the amount invest @ 6.5% =
The amount invested @ 4.5% =
Let the interest earned @ 6.5% =
The interest earned @ 4.5% =
-----------------------------------------------------
(1)

(2)

-------------------------
I'll assume that ( one year )
(1)

(2)

-----------------------------------------
Substitute (1) into (2)

and

---------------------------
She invested $37,500 @ 6.5%
She invested $28,500 @ 4.5%
----------------------------
check:

and

OK
Get a 2nd opinion if needed

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