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Malik invests money in an account paying simple interest. He invests 
$30 and no money is added or removed from the investment. After one year, he has $30.30. What is the simple percent interest per year?
Answer: 
%

Malik invests money in an account paying simple interest. He invests $30 \$ 30 and no money is added or removed from the investment. After one year, he has $30 \$ 30 .3030. What is the simple percent interest per year?\newlineAnswer: ______% \%

Full solution

Q. Malik invests money in an account paying simple interest. He invests $30 \$ 30 and no money is added or removed from the investment. After one year, he has $30 \$ 30 .3030. What is the simple percent interest per year?\newlineAnswer: ______% \%
  1. Identify Investment, Amount, Interest: Identify the initial investment, the final amount after one year, and the interest earned.\newlineInitial investment (Principal, PP) = $30\$30\newlineFinal amount after one year (AA) = $30.30\$30.30\newlineInterest earned (II) = Final amount - Initial investment\newlineI=$30.30$30I = \$30.30 - \$30\newlineI=$0.30I = \$0.30
  2. Use Simple Interest Formula: Use the formula for simple interest to find the rate.\newlineThe formula for simple interest is I=PRTI = PRT, where II is the interest earned, PP is the principal amount, RR is the rate of interest per year, and TT is the time in years.\newlineWe know I=$0.30I = \$0.30, P=$30P = \$30, and T=1T = 1 year. We need to find RR.\newlineRearrange the formula to solve for RR:\newlineII00
  3. Substitute Values, Solve for Rate: Substitute the known values into the formula and solve for RR. \newlineR=extextdollar0.30(extextdollar301 year)R = \frac{ ext{ extdollar}0.30}{( ext{ extdollar}30 * 1 \text{ year})}\newlineR=extextdollar0.30extextdollar30R = \frac{ ext{ extdollar}0.30}{ ext{ extdollar}30}\newlineR=0.01R = 0.01\newlineTo express RR as a percentage, we multiply by 100100.\newlineR=0.01100R = 0.01 * 100\newlineR=1%R = 1\%

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