Understanding Simple Interest and Compound Growth

The video tutorial covers the calculation of simple interest using the IPRY formula, where interest is calculated by multiplying the principal, rate, and time. It then explains compound growth, which involves repeated percentage increases or decreases over time, and provides examples of calculating compound interest and depreciation. The tutorial also highlights the importance of rearranging formulas to solve for different variables.

What is the formula used to calculate simple interest?

• Principal x Rate x Time

• Principal + Rate + Time

• Principal x Rate / Time

• Principal - Rate x Time

In the context of compound growth, what happens to the amount each year?

• It decreases by a fixed amount.

• It remains the same.

• It doubles every year.

• It increases or decreases by a percentage.

How do you calculate the multiplier for compound interest when the rate is increasing?

• Subtract the rate from 1

• Divide the rate by 1

• Add the rate to 1

• Multiply the rate by 2

What is the result of applying a 5% interest rate to an amount of 4,000 pounds for 3 years?

• 4,630.50 pounds

• 4,200 pounds

• 4,000 pounds

• 5,000 pounds

If a value decreases by 15% per year, what is the multiplier used for depreciation?

• 1.15

• 0.85

• 1.85

• 0.15