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A person places 
$4290 in an investment account earning an annual rate of 
3.7%, 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 2 years.
Answer:

A person places $4290 \$ 4290 in an investment account earning an annual rate of 3.7% 3.7 \% , 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 22 years.\newlineAnswer:

Full solution

Q. A person places $4290 \$ 4290 in an investment account earning an annual rate of 3.7% 3.7 \% , 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 22 years.\newlineAnswer:
  1. Identify Given Values: Identify the given values from the problem.\newlinePrincipal P=$4290P = \$4290\newlineRate of interest r=3.7%r = 3.7\% or 0.0370.037 (as a decimal)\newlineTime t=2t = 2 years\newlineWe will use the formula V=PertV = Pe^{rt} to find the value of the account after 22 years.
  2. Convert to Decimal: Convert the percentage rate to a decimal.\newlineTo convert a percentage to a decimal, divide by 100100.\newline3.7%=3.7100=0.0373.7\% = \frac{3.7}{100} = 0.037
  3. Substitute into Formula: Substitute the values into the formula. V=4290×e(0.037×2)V = 4290 \times e^{(0.037 \times 2)}
  4. Calculate Exponent: Calculate the exponent part of the formula. 0.037×2=0.0740.037 \times 2 = 0.074
  5. Calculate e Value: Calculate ee raised to the power of the exponent.\newlinee0.074e^{0.074} (Use a calculator for this step)\newlinee0.0741.076849e^{0.074} \approx 1.076849
  6. Multiply Principal: Multiply the principal by the result from the previous step.\newlineV=4290×1.076849V = 4290 \times 1.076849
  7. Find Account Value: Perform the multiplication to find the value of the account after 22 years. V4290×1.0768494620.03V \approx 4290 \times 1.076849 \approx 4620.03

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