Answer:
I believe the answer is $1.52. hope this helps
You will have to use a ruler for this on the chart
M = Monthly Allowance.
N = 5/7 of M (Monthly Allowance)
5/7 of 5/7 of M = 9.60
5/7 * 5/7 * M = 9.60
Rearrange the formula to find M
M = 9.60 / (5/7) / (5/7) = 18.816
<h2>Monthly Allowance = $18.816</h2>
Find the interest amount.
Use the formula for simple interest.
Solve for t.
<h2>3 years.</h2>