Answer:
$90
Step-by-step explanation:
You want the principal invested at 4% that earned $90 in simple interest after 3 years.
You are given the formula ...
I = Prt
Filling in the given values, you can solve for P.
90 = P×0.04×3
90/0.12 = P = 750 . . . . . divide by the coefficient of P
Imani's principal balance was $750.