Question
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A video game costs \( \$ 60 \) today. It the inflation rate is \( 4.75 \% \) and is compounded continuously how much will this same video game cost in 5 years? Round your answer to the nearest cent (hundredth).

Ask by Murray Higgins. in the United States
Jan 21,2025

Real Tutor Solution

Tutor-Verified Answer

Answer

The video game will cost approximately \$76.08 in 5 years.

Solution

To find the cost of the video game in 5 years with continuous compounding, we can use the formula for continuous compounding: \[ A = P \times e^{r \times t} \] Where: - \( A \) is the amount after time \( t \), - \( P \) is the principal amount (initial cost), - \( r \) is the annual interest rate (in decimal form), - \( t \) is the time in years. Given: - Initial cost of the video game today: \( P = \$60 \) - Inflation rate: \( r = 4.75\% = 0.0475 \) (in decimal form) - Time: \( t = 5 \) years Substitute the values into the formula: \[ A = 60 \times e^{0.0475 \times 5} \] Now, we can calculate the cost of the video game in 5 years using the formula for continuous compounding. Calculate the value by following steps: - step0: Calculate: \(60e^{0.0475\times 5}\) - step1: Multiply the numbers: \(60e^{0.2375}\) - step2: Convert the expressions: \(60e^{\frac{19}{80}}\) - step3: Rewrite the expression: \(60\sqrt[80]{e^{19}}\) The cost of the video game in 5 years with continuous compounding is approximately $76.08. Rounding to the nearest cent (hundredth), the cost will be $76.08.

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Bonus Knowledge

To calculate the future cost of the video game given continuous compounding, we can use the formula: \[ A = Pe^{rt} \] where: - \( A \) is the amount of money accumulated after time \( t \), - \( P \) is the principal amount (the initial price, in this case, \( \$60 \)), - \( r \) is the annual interest rate (inflation rate here, so \( 0.0475 \)), - \( t \) is the time in years (5 years), - \( e \) is the base of the natural logarithm (approximately \( 2.71828 \)). Substituting in the values: \[ A = 60 \times e^{(0.0475 \times 5)} \] Calculating: 1. Compute \( 0.0475 \times 5 = 0.2375 \). 2. Find \( e^{0.2375} \) which is approximately \( 1.2682 \). 3. Multiply \( 60 \times 1.2682 \approx 76.09 \). So, the video game will cost approximately **$76.09** in 5 years, rounded to the nearest cent.

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