Jacob invested $300 in a savings account and earned $81 in simple interest at the end of 9 years. what was the interest rate a) 3% b) 3.5% c) 4% d) 4.5%

A) 3%

Step-by-step explanation:

I = P(RT)

I = interest

P = principle

r= rate

t = time

81 = 300  r * 9

81 = 2700*r

divide by 2700

81/2700 = r

.03 =r

multiply by 100 to get the percent

3 =r

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