Final answer:
To calculate the total cost Rebecca needs to pay, including a 20% discount and 8% sales tax on a pair of pants, first find the discounted price and then add the sales tax. The final total is $56.16.
Step-by-step explanation:
Rebecca went to buy a pair of pants that cost $65. Since they are on sale for 20% off, we first calculate the discount amount by multiplying the original price by the discount percentage:
$65 × 0.20 = $13
Next, we subtract the discount from the original price to find the sale price:
$65 - $13 = $52
Now, we must calculate the sales tax, which is 8% of the sale price. We convert the percentage to a decimal and multiply it by the sale price:
$52 × 0.08 = $4.16
Finally, we add the sales tax to the sale price to find the total cost Rebecca needs to pay:
$52 + $4.16 = $56.16
Therefore, Rebecca has to pay a total of $56.16 for the pants including the sales tax.