
Catherine D. answered 10/14/15
Tutor
4.8
(11)
Engineer looking to help you succeed!
I = Pxrxt
Where P is your Principal amount ($750), r is your interest rate (3% per year in decimal form) , and t is your time in years.
You didn't specify how many years for your problem so I went ahead and just calculated it for 1 year.
I=750*0.03*1 = 22.50
So your interest is $22.50.
Usually now, the interest is added onto the principal to figure some new amount. So if you loaned $750 you now owe 750+22.5 = $772.50

Terrence T.
10/14/15