Sales Tax and Interest Concepts

This video tutorial covers the applications of percent, focusing on sales tax and simple interest. It begins with an introduction to sales tax as a form of markup, using examples to illustrate the concept. The lesson then transitions to simple interest, explaining its calculation using the formula I = PRT (Interest = Principal x Rate x Time). The video includes practice problems to reinforce understanding and concludes with strategies for solving multi-step problems involving percent. The tutorial aims to build confidence in handling these mathematical concepts.

In the bar model example, what is the sales tax on an $80 jacket with an 8% tax rate?

• $10.00

• $4.80

• $8.00

• $6.40

What is the primary purpose of sales tax?

• To provide additional income to the buyer

• To increase the profit of the seller

• To reduce the cost of goods

• To generate revenue for the government

How is the total cost of an item with sales tax calculated?

• By subtracting the tax from the original price

• By adding the tax percentage to the original price

• By multiplying the original price by the tax rate

• By dividing the original price by the tax rate

What does the 'P' in the simple interest formula I = PRT stand for?

• Profit

• Principal

• Percentage

• Payment

How is simple interest different from compound interest?

• Simple interest includes interest on interest

• Simple interest is calculated on the original principal only

• Simple interest is calculated monthly

• Simple interest is always higher than compound interest

If Terry deposits $200 at a 3% interest rate, how much interest does he earn in one year?

• $3.00

• $6.00

• $9.00

• $12.00

What is the total amount in Terry's account after two years with simple interest?

• $212.00

• $218.00

• $206.00

• $224.00

How much interest does Ariana pay on a $400 loan at 5% interest over four years?

• $100.00

• $40.00

• $20.00

• $80.00

What is the total cost of a meal priced at $60 with a 7% tax and a 15% tip?

• $73.20

• $70.20

• $75.00

• $69.00

If Kedar earns a 3.75% commission on $4,500 sales, what is his commission?

• $200.00

• $150.00

• $168.75

• $175.00