The annual interest rate for this note that would earn the interest of $160 is 8%.
In order to solve this problem, we have to use the interest rate formula
[tex]InterestRate = P*R *T[/tex]
where
We divide 90 days by the total days in a year
= 90/365
= 0.2466
Principle * time
= 0.2466 * 8000 = 1972.6
The annual interest rate
= 160/1972.6
= 0.081
= 8%
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