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Find the annual interest rate paid on this loan:

interest = $81; principal = $10,800; time = 1 month

9%

Step-by-step explanation:

To solve this problem we can use a modified version of the simple interest formula which is shown below:

I = interest amount

P = principal amount

t = time (in years)

To start, we need to convert 1 month into a decimal (out of a year):

Now we can plug in the values:

The last step is to convert 0.09 into a percent:

0.09(100) = 9

The annual interest rate is 9%

{3 + i, 3 - i, 3, -1}

step-by-step explanation: