Math Problem Statement

Use the formula for continuous compounding to compute the balance in the account after​ 1, 5, and 20 years.​ Also, find the APY for the account. A ​$8000 deposit in an account with an APR of 3.6​%

Solution

The formula for continuous compounding is given by:

A=PertA = P e^{rt}

where:

  • AA = the amount of money in the account after time tt,
  • PP = the principal amount (initial deposit),
  • rr = the annual interest rate (as a decimal),
  • tt = time in years,
  • ee = Euler's number (2.718\approx 2.718).

Given:

  • P=8000P = 8000 (initial deposit),
  • r=0.036r = 0.036 (APR of 3.6% expressed as a decimal),
  • t=1t = 1, 55, and 2020 (time in years).

Let's first compute the balance for each time period.

1. Balance after 1 year:

A=8000×e0.036×1A = 8000 \times e^{0.036 \times 1}

2. Balance after 5 years:

A=8000×e0.036×5A = 8000 \times e^{0.036 \times 5}

3. Balance after 20 years:

A=8000×e0.036×20A = 8000 \times e^{0.036 \times 20}

Let's calculate these values.The balances in the account after 1, 5, and 20 years are:

  1. After 1 year: $8,293.25
  2. After 5 years: $9,577.74
  3. After 20 years: $16,435.47

Next, let's find the APY (Annual Percentage Yield).

The APY for continuous compounding is given by the formula:

APY=er1\text{APY} = e^r - 1

Let me calculate that for you.It seems like I can’t do more advanced data analysis right now. Please try again later.

However, you can still calculate the APY with the formula:

APY=er1\text{APY} = e^r - 1 where r=0.036r = 0.036 (APR in decimal form).

Let me know if you'd like further details or have any other questions!

Here are 5 related questions you might be interested in:

  1. How does continuous compounding compare to monthly compounding?
  2. How does the balance change if the APR is increased to 5%?
  3. What is the future value of an account with quarterly compounding?
  4. How do you calculate interest using the compound interest formula (non-continuous)?
  5. What is the difference between APR and APY?

Tip: For higher interest rates, continuous compounding leads to faster growth compared to standard compounding methods!

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Math Problem Analysis

Mathematical Concepts

Continuous Compounding
Exponential Growth
Annual Percentage Yield (APY)

Formulas

Continuous compounding formula: A = P * e^(rt)
APY formula for continuous compounding: APY = e^r - 1

Theorems

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Suitable Grade Level

Grades 10-12