Calculating Simple Interest and Total Amount

This video tutorial introduces the concept of simple interest, explaining its components such as principal, rate, and time. It demonstrates how to calculate simple interest using the formula I = PRT, with examples of finding interest and total amounts. The tutorial also covers comparing loan options and calculating unknown variables like interest rate and loan duration.

What does simple interest represent?

• A fee for borrowing money

• The total amount of money saved

• A percentage of the principal amount

• The principal amount itself

How is simple interest calculated?

• I = P / RT

• I = PRT

• I = P + RT

• I = P - RT

What is the principal amount?

• The time period of the loan

• The rate of interest

• The initial amount of money borrowed or invested

• The total amount after interest

If $500 is invested at a 6.25% rate for 3 years, what is the simple interest earned?

• $100.00

• $93.75

• $87.50

• $95.00

For a loan of $770 at 16% interest for 6 months, what is the total amount to be paid?

• $800.00

• $820.00

• $831.60

• $845.00

Which loan option is more cost-effective based on simple interest calculations?

• Cannot be determined

• Both are equal

• Option B: $12,400

• Option A: $9,150

How can you find the rate of interest if the principal, time, and interest earned are known?

• Multiply the principal by the time

• Divide the interest by the product of principal and time

• Subtract the principal from the interest

• Add the principal to the interest and divide by time

What is the simple interest rate if $200 earns $50 over 5 years?

• 5%

• 7.5%

• 2.5%

• 10%

If Miss Douglas invests $200 and earns $50 in simple interest, what was the rate?

• 2.5%

• 10%

• 25%

• 5%

Oliver buys a car with a loan at 4.7% interest. If he pays back $25,640 for a $20,000 loan, how long was the loan for?

• 4 years

• 5 years

• 7 years

• 6 years