Math Problem Statement

  1. You win the lottery and get $1,000,000. You decide that you want to invest all of the money in a savings account for 5 years. A bank representative offers you two different savings plans. Plan 1-The bank gives you a 6% interest rate and compounds the interest each month. Plan 2- The bank gives you a 12% interest rate and compounds the interest each month. A) How much money will you have at the end of the 5 years in plan 1? Round to the nearest cent. Show all your work.

Solution

To calculate the amount of money you'll have at the end of 5 years with Plan 1, we will use the formula for compound interest:

A=P(1+rn)ntA = P \left(1 + \frac{r}{n}\right)^{nt}

Where:

  • AA = the future value of the investment (what we're solving for)
  • PP = the principal amount (initial investment) = $1,000,000
  • rr = the annual interest rate = 6% = 0.06
  • nn = the number of times the interest is compounded per year = 12 (since it's compounded monthly)
  • tt = the time in years = 5

Now, plug the values into the formula:

A=1,000,000(1+0.0612)12×5A = 1,000,000 \left(1 + \frac{0.06}{12}\right)^{12 \times 5}

Simplifying:

A=1,000,000(1+0.005)60A = 1,000,000 \left(1 + 0.005\right)^{60}

A=1,000,000(1.005)60A = 1,000,000 \left(1.005\right)^{60}

Now, calculate 1.005601.005^{60}:

1.005601.348851.005^{60} \approx 1.34885

Finally, multiply by 1,000,000:

A1,000,000×1.34885=1,348,850A \approx 1,000,000 \times 1.34885 = 1,348,850

So, at the end of 5 years, you will have approximately $1,348,850.00 in Plan 1.


Would you like to explore Plan 2 or need more details?

Here are 5 related questions to further explore:

  1. What would happen if the interest was compounded quarterly instead of monthly?
  2. How much would you have with a 10-year investment period in Plan 1?
  3. How does the interest rate affect the growth of your savings?
  4. What is the formula for continuously compounded interest, and how does it compare to monthly compounding?
  5. If you withdrew some money after 3 years, how would it impact your final balance?

Tip: The more frequently interest is compounded, the more you earn, as each compounding period adds to the principal for the next period.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Compound Interest
Exponential Growth
Algebra

Formulas

A = P(1 + r/n)^(nt)
A = 1,000,000(1 + 0.06/12)^(12*5)

Theorems

Compound Interest Theorem

Suitable Grade Level

Grades 10-12