Math Problem Statement

Aaron invested $7,500 in an account paying an interest rate of 1.5% compounded continuously. Assuming no deposits or withdrawals are made, how much money, to the nearest hundred dollars, would be in the account after 8 years?

Solution

To calculate the amount of money in the account after 8 years with continuous compounding, we use the formula for continuously compounded interest:

A=P×ertA = P \times e^{rt}

Where:

  • AA is the amount of money in the account after time tt.
  • PP is the principal amount (initial investment), which is $7,500.
  • rr is the annual interest rate (as a decimal), which is 1.5%, or 0.015.
  • tt is the time in years, which is 8 years.
  • ee is the base of the natural logarithm (approximately 2.71828).

Substituting the values:

A=7500×e(0.015×8)A = 7500 \times e^{(0.015 \times 8)}

Let's calculate this.After 8 years, the amount of money in the account would be approximately $8,500, rounded to the nearest hundred dollars.

Would you like more details or have any questions?

Here are 5 related questions you might find interesting:

  1. How much would the account hold after 10 years with the same interest rate?
  2. What would the future value be if the interest rate were 2% instead of 1.5%?
  3. How much interest would Aaron earn over 8 years?
  4. How would the final amount change if the interest were compounded annually instead of continuously?
  5. What is the effective annual rate (EAR) for the continuous compounding at 1.5%?

Tip: Continuous compounding grows money faster than periodic compounding because interest is added an infinite number of times per year, albeit in infinitesimally small amounts.

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Math Problem Analysis

Mathematical Concepts

Continuous Compounding
Exponential Growth

Formulas

Continuous compounding formula A = P * e^(rt)

Theorems

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Suitable Grade Level

Grades 10-12