9514 1404 393
Answer:
3
Step-by-step explanation:
The simple interest formula is useful here:
I = Prt
where I is the interest earned on principal P invested at rate r for t years.
Filling in the given information, we can solve for the unknown.
135 = 1000·0.045·t
135/45 = t = 3
It will take 3 years for Sam to earn $135 on his account.
