Question

Find the annual interest rate. I=$54, P=$900, t=18 months

Answer 1

0.00333333333 or 0.3%.

Explanation:

More Info:

I tried this answer on Big Ideas, but it said it was wrong. I calculated it many times and got the same exact answer. Heads Up! It might be wrong. If it is, my answer is the only one I got...

Answer 2

54=900(18)r
54=16200r
0.0033333=r