Simple Interest Calculations

The video tutorial explains how to calculate the total balance of an account after 36 months using simple interest. It begins by introducing the problem and the simple interest formula: I = P * R * T, where I is the interest, P is the principal, R is the rate as a decimal, and T is time in months. The tutorial demonstrates converting a 0.5% monthly interest rate to a decimal (0.005) and emphasizes the importance of matching the time unit with the rate. It then calculates the interest earned over 36 months, which is $270, and adds it to the principal of $1,500 to find the total balance of $1,770. The video concludes with a summary of the steps taken to solve the problem.

What is the principal amount deposited by the customer?

• $1,500

• $1,000

• $2,500

• $2,000

How is the simple interest rate expressed as a decimal?

• 0.0005

• 0.05

• 0.5

• 0.005

What does the 'T' represent in the simple interest formula I = P * R * T?

• Time in months

• Total balance

• Total interest

• Time in years

How much interest is earned over 36 months?

• $150

• $450

• $300

• $270

What is the total balance after 36 months?

• $2,000

• $1,800

• $1,770

• $1,500

Which of the following is NOT needed to calculate simple interest?

• Principal amount

• Interest rate

• Time period

• Account number