Final answer:
A 15% discount on a $70 backpack is $10.50, making the selling price $59.50.
Step-by-step explanation:
The student is asking for help in calculating the amount of discount given on a backpack and the resultant selling price after applying a 15% discount on the marked price of $70. To solve this, you will first need to calculate the discount amount by converting the discount rate from a percentage into a decimal. Then, you multiply this decimal by the marked price to find the dollar amount of the discount.
Calculate the discount:
$70 Ă— 0.15 = $10.50
Now, subtract the discount from the marked price to find the selling price:
$70 - $10.50 = $59.50
The correct answer is a): Discount: $10.50, Selling Price: $59.50.