SOLUTION: Michelle Payne deposited $7,800 in a savings account paying 7.00% simple interest. How long will it take for her investment to amount to $10,400?

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Question 1129317: Michelle Payne deposited $7,800 in a savings account paying 7.00% simple interest. How long will it take for her investment to amount to $10,400?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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Michelle Payne deposited $7,800 in a savings account paying 7.00% simple interest.
How long will it take for her investment to amount to $10,400?
:
simple interest formula: I = PRT
Find the amt of interest. 10400 - 7800 = 2600
7800*.07*t = 2600
546t = 2600
t = 2600/546
t = 4.76 ~ 5 years