Set up compound interest formula: To solve for the initial principal P, we need to rearrange the compound interest formula to solve for P. The formula is given by A=P(1+r/n)(nt), where A is the amount of money accumulated after n years, including interest, P is the principal amount, r is the annual interest rate (decimal), n is the number of times that interest is compounded per year, and t is the time the money is invested for in years. In this problem, A=200,000, P0, P1 (since the interest is compounded annually), and P2 years.
Plug in given values: First, we plug in the given values into the formula: 200,000=P×(1+0.13)10.
Simplify expression: Next, we simplify the expression inside the parentheses: 1+0.13=1.13.
Calculate value: Now, we raise 1.13 to the power of 10: (1.13)10. Using a calculator, we find that (1.13)10≈3.39357057.
Divide both sides: We then divide both sides of the equation by 3.39357057 to solve for P: P=3.39357057200,000.
Perform division: Finally, we perform the division: P≈3.39357057200,000≈58,946.12.
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