Simple Interest and Percentages

The video tutorial explains how to solve a word problem involving interest calculation. It begins by reading the problem, which asks how much interest is earned on $3,000 at a 9% annual interest rate over five years. The interest formula, I = PRT, is introduced, where I is interest, P is principal, R is rate, and T is time. The tutorial demonstrates how to apply the formula by substituting the given values: $3,000 for principal, 0.09 for rate, and 5 for time. The calculation is performed step-by-step, resulting in an interest of $1,350.

What is the principal amount mentioned in the problem?

• $9,000

• $5,000

• $3,000

• $1,000

For how many years is the money invested?

• 3 years

• 5 years

• 7 years

• 9 years

What is the annual interest rate given in the problem?

• 9%

• 7%

• 5%

• 11%

What is the first step in solving the word problem?

• Find the principal

• Calculate the interest

• Read the problem

• Write the formula

Which formula is used to calculate simple interest?

• I = P + R + T

• I = P * R * T

• I = P / R / T

• I = P - R - T

In the formula I = PRT, what does 'P' stand for?

• Percentage

• Principal

• Profit

• Period

In the formula I = PRT, what does 'R' represent?

• Rate of interest

• Return

• Ratio

• Revenue

In the formula I = PRT, what does 'T' signify?

• Tax

• Time

• Transaction

• Total

What is the purpose of using the interest formula?

• To set the interest rate

• To determine the time period

• To calculate the interest earned

• To find the principal

What is the value of 3,000 multiplied by 0.09?

• 270

• 300

• 450

• 540