Mrs. Sing invests 12 dollars comma 876 for her business at an annual interest rate of 7 percent for 3 years. Which number will Mrs. Sing substitute for r in the simple interest formula? l is equal to p r t

In the simple interest formula I = prt, the rate r must be written as a decimal. Convert 7 percent to a decimal by dividing by 100: 7 ÷ 100 = 0.07. Mrs. Sing should substitute 0.07, which is choice A.

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