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A person places 
$634 in an investment account earning an annual rate of 
6.4%, 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 13 years.
Answer:

A person places $634 \$ 634 in an investment account earning an annual rate of 6.4% 6.4 \% , 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 1313 years.\newlineAnswer:

Full solution

Q. A person places $634 \$ 634 in an investment account earning an annual rate of 6.4% 6.4 \% , 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 1313 years.\newlineAnswer:
  1. Identify Given Values: Identify the given values from the problem.\newlinePrincipal PP = $634\$634\newlineRate of interest rr = 6.4%6.4\% or 0.0640.064 (as a decimal)\newlineTime tt = 1313 years\newlineWe will use the formula V=PertV = Pe^{rt} to find the value of the account after 1313 years.
  2. Convert Rate to Decimal: Convert the percentage rate to a decimal.\newlineTo convert a percentage to a decimal, divide by 100100.\newliner=6.4%=6.4100=0.064r = 6.4\% = \frac{6.4}{100} = 0.064
  3. Substitute Values: Substitute the values into the formula. V=634×e(0.064×13)V = 634 \times e^{(0.064 \times 13)}
  4. Calculate Exponent: Calculate the exponent part of the formula.\newline0.064×13=0.8320.064 \times 13 = 0.832
  5. Calculate eExponente^{\text{Exponent}}: Calculate ee raised to the power of the exponent.e0.832e^{0.832} (This calculation requires a scientific calculator or software that can compute ee to a given power.)
  6. Multiply Principal: Multiply the principal by the result from Step 55.\newlineAssuming e0.8322.2996e^{0.832} \approx 2.2996 (using a calculator)\newlineV=634×2.2996V = 634 \times 2.2996
  7. Perform Multiplication: Perform the multiplication to find the final value.\newlineV634×2.29961457.9984V \approx 634 \times 2.2996 \approx 1457.9984
  8. Round Final Value: Round the final value to the nearest cent. V \approx \$(\(1457.99849984) \approx \$(\(1458\).\(00\))

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