Q. 7700 dollars is placed in an account with an annual interest rate of 8%. How much will be in the account after 22 years, to the nearest cent?Answer:
Identify values: Identify the initial principal amount, the annual interest rate, and the time period.The initial principal amount P is $7700, the annual interest rate r is 8% or 0.08 in decimal form, and the time period t is 22 years.
Determine interest type: Determine the type of interest being applied.If the interest is compounded annually, we will use the formula for compound interest: A=P(1+r/n)(nt), where A is the amount of money accumulated after n years, including interest, n is the number of times that interest is compounded per year, and t is the time the money is invested for in years. Since the problem does not specify the compounding frequency, we will assume it is compounded annually, so n=1.
Substitute into formula: Substitute the known values into the compound interest formula.Using the values from Step 1 and assuming annual compounding from Step 2, we get:A=7700(1+0.08/1)(1×22)
Calculate accumulated amount: Calculate the amount of money accumulated after 22 years.A=7700(1+0.08)22A=7700(1.08)22Now we need to calculate (1.08)22.
Calculate (1.08)22: Calculate (1.08)22 using a calculator.(1.08)22≈5.0226 (rounded to four decimal places for intermediate calculations)
Multiply by principal amount: Multiply the result from Step 5 by the initial principal amount.A=7700×5.0226A≈38674.02
Round final answer: Round the final answer to the nearest cent.The amount of money in the account after 22 years, rounded to the nearest cent, is approximately $38,674.02.
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