Final answer:
After applying a 25% discount to the original price of $75 and adding a 5% sales tax to the discounted price, Serena Williams will pay a total of $59.06 for the sweater.
Step-by-step explanation:
The question involves calculating the final price of a sweater after applying a discount and then adding sales tax. Serena Williams wants to buy a sweater originally priced at $75 with a discount of 25% and a sales tax of 5%. First, we calculate the discounted price of the sweater by taking 25% off the original price. Then, we add a 5% sales tax to the discounted price to find the total cost that Serena will pay for the sweater.
To calculate the discount:
- Convert the percentage to a decimal form: 25% = 0.25.
- Multiply the original price by the decimal: $75 * 0.25 = $18.75.
- Subtract the discount from the original price: $75 - $18.75 = $56.25.
Now, to calculate the sales tax on the discounted price:
- Convert the sales tax rate to a decimal: 5% = 0.05.
- Multiply the discounted price by the sales tax rate: $56.25 * 0.05 = $2.81.
- Add the sales tax to the discounted price: $56.25 + $2.81 = $59.06.
Therefore, the total cost of the sweater, including sales tax, will be $59.06.