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A person places 
$78800 in an investment account earning an annual rate of 
7.4%, compounded continuously. Using the formula 
V=Pe^(rt), where 
V is the value of the account in 
t years, 
P is the principal initially invested, 
e is the base of a natural logarithm, and 
r is the rate of interest, determine the amount of money, to the nearest cent, in the account after 3 years.
Answer:

A person places $78800 \$ 78800 in an investment account earning an annual rate of 7.4% 7.4 \% , compounded continuously. Using the formula V=Pert V=P e^{r t} , where V \mathrm{V} is the value of the account in t t years, P \mathrm{P} is the principal initially invested, e \mathrm{e} is the base of a natural logarithm, and r r is the rate of interest, determine the amount of money, to the nearest cent, in the account after 33 years.\newlineAnswer:

Full solution

Q. A person places $78800 \$ 78800 in an investment account earning an annual rate of 7.4% 7.4 \% , compounded continuously. Using the formula V=Pert V=P e^{r t} , where V \mathrm{V} is the value of the account in t t years, P \mathrm{P} is the principal initially invested, e \mathrm{e} is the base of a natural logarithm, and r r is the rate of interest, determine the amount of money, to the nearest cent, in the account after 33 years.\newlineAnswer:
  1. Identify Given Values: Identify the given values from the problem.\newlinePrincipal PP = $78800\$78800\newlineRate of interest rr = 7.4%7.4\% or 0.0740.074 (as a decimal)\newlineTime tt = 33 years\newlineWe will use the formula V=PertV = Pe^{rt} to find the value of the account after 33 years.
  2. Convert Percentage to Decimal: Convert the percentage rate to a decimal. 7.4%7.4\% as a decimal is 0.0740.074.
  3. Substitute Values into Formula: Substitute the given values into the formula. V=78800×e0.074×3V = 78800 \times e^{0.074 \times 3}
  4. Calculate Exponent: Calculate the exponent part of the formula. 0.074×3=0.2220.074 \times 3 = 0.222
  5. Calculate e Value: Calculate ee raised to the power of the result from Step 44.e0.222e^{0.222} (Use a calculator for this step)
  6. Multiply Principal: Multiply the principal by the result from Step 55.\newlineV=78800×e0.222V = 78800 \times e^{0.222}\newline(Use a calculator to find the value of e0.222e^{0.222} and then multiply by 7880078800)
  7. Round Final Result: Round the final result to the nearest cent. (Use a calculator to get the final value and round it to two decimal places)

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