Intermediate Algebra: Simple Interest

What is the formula for calculating simple interest?

• Interest = Principal - Rate - Time

• Interest = Principal / Rate / Time

• Interest = Principal x Rate x Time

• Interest = Principal + Rate + Time

If you invest $1,500 at a 7% interest rate for one year, how much interest will you earn?

• $105

• $150

• $90

• $75

What is the principal amount in the first example?

• $500

• $1,500

• $1,000

• $2,000

What is the main difference between simple and compounded interest?

• Compounded interest is only used for loans, not investments.

• Simple interest is always higher than compounded interest.

• Simple interest is calculated on the initial principal only, compounded interest is calculated on the principal plus any accumulated interest.

• Simple interest is calculated annually, compounded interest is not.

Why is simple interest used in this tutorial instead of compounded interest?

• The tutorial is focused on intermediate algebra concepts.

• Simple interest is easier to calculate.

• Simple interest is more accurate.

• Compounded interest is not applicable to investments.

What should you consider if you want to calculate interest for more than one year?

• Using a higher interest rate

• Switching to compounded interest calculations

• Reducing the time period

• Investing more money

In the second example, what is the interest rate for the $500 investment?

• 7%

• 13%

• 10%

• 133%

How much total interest is earned from the two investments in the second example?

• $145

• $120

• $150

• $135

What is the total value of the investments at the end of the second example?

• $1,550

• $1,700

• $1,500

• $1,635

What is the purpose of splitting the principal into two investments in the second example?

• To invest in different currencies

• To simplify calculations

• To maximize interest earned

• To reduce risk