Question

katherine invested $140.she earned a simple interest of 4% per year on the initial investment. if no money was added or removed from the vestment what was the amount of interst katherine received at the end of two years

Answer 1

I=PRT is the simple interest formula.
I=140*.04*2
I=$11.20
so, she got $11.20 in interest, and now she has $151.20 in the account.

Answer 2

i = p r t

Here, i = $140 (0.04) (2 yr) = $11.20 (answer)