Understanding Discounts, Sale Prices, and Taxes

What is the primary mathematical concept used to solve shopping problems involving discounts and taxes?

• Geometry

• Proportions

• Algebraic equations

• Calculus

If a surfboard costs $69 and is on sale for 35% off, what is the discount amount?

• $30.00

• $34.50

• $24.15

• $21.00

After applying a 35% discount to a $69 surfboard, what is the sale price before tax?

• $44.85

• $47.00

• $45.00

• $46.00

What is the final price of the surfboard after adding a 7% tax to the sale price?

• $50.00

• $49.00

• $48.50

• $47.99

What is the purpose of rounding the tax amount to two decimal places in the surfboard problem?

• To simplify calculations

• To reduce errors

• To increase accuracy

• To match currency format

In the cell phone problem, what percentage of the original price does the sale price represent after a 30% discount?

• 30%

• 50%

• 100%

• 70%

What is the common mistake made when aligning the discount percentage with the sale price in the cell phone problem?

• Ignoring the tax

• Using the wrong percentage for the original price

• Aligning the sale price with the discount percentage

• Using the full price as the discount

How do you find the original price of the cell phone if the sale price is $239.99 after a 30% discount?

• Divide the sale price by 0.7

• Subtract 30% from the sale price

• Add 30% to the sale price

• Multiply the sale price by 1.3

What is the original price of the cell phone if the sale price is $239.99 after a 30% discount?

• $400.00

• $350.00

• $300.00

• $342.70

What should you do if you make a mistake while setting up a proportion for a discount problem?

• Ignore the mistake

• Ask for help

• Recalculate using the same setup

• Correct the setup and recalculate