Math Problem Statement

Find the compound amount and the amount of interest earned by the following deposit. ​$5900 at 3.3​% compounded continuously for 6 years.

Solution

To solve for the compound amount and the interest earned with continuous compounding, we use the formula for continuous compounding:

A=PertA = P e^{rt}

Where:

  • AA is the final amount (compound amount),
  • PP is the principal amount (initial deposit),
  • rr is the annual interest rate (expressed as a decimal),
  • tt is the time in years,
  • ee is the base of the natural logarithm (approximately 2.71828).

Given:

  • P=5900P = 5900 (initial deposit),
  • r=3.3%=0.033r = 3.3\% = 0.033 (interest rate),
  • t=6t = 6 years.

Now we calculate the compound amount AA:

A=5900×e0.033×6A = 5900 \times e^{0.033 \times 6}

A=5900×e0.198A = 5900 \times e^{0.198}

Using e0.1981.219e^{0.198} \approx 1.219:

A5900×1.219=7192.1A \approx 5900 \times 1.219 = 7192.1

So, the compound amount is approximately A=7192.10A = 7192.10.

To find the interest earned:

Interest=AP=7192.105900=1292.10\text{Interest} = A - P = 7192.10 - 5900 = 1292.10

Thus, the interest earned is approximately $1292.10.

Would you like further details on the steps or calculations?


Here are 5 related questions for practice:

  1. What is the compound amount for $4500 at 5% compounded continuously for 4 years?
  2. How would the interest change if the rate were 4.5% instead of 3.3%?
  3. What is the formula for compound interest with annual compounding?
  4. Can you derive the general formula for compound interest from first principles?
  5. What is the difference between continuous and periodic compounding in terms of growth?

Tip: Continuous compounding grows slightly faster than periodic compounding because interest is added constantly.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Exponential Growth
Continuous Compounding
Interest Calculation

Formulas

A = P * e^(rt) (Continuous Compounding Formula)

Theorems

Natural Exponential Growth in Financial Mathematics

Suitable Grade Level

Grades 10-12