ONLY ANSWER IF YOU ACTUALLY KNOW THE ANSWER, AND IS ABLE TO EXPLAIN EVERYTHINGCait purchased a $20 item at a store. She uses a coupon to receive a 15% discount, and she pays a 6% sales tax on item. She calculates the total cost, in dollars, of the item using the expression: (1.15)(1.06)(20)A. Describe the error in the expression Cait used for her calculations.B. Show or explain how you would calculate the total cost of Cait's purchase.
Accepted Solution
A:
A. Describe the error in the expression Cait used for her calculations. For this case we have: She uses a coupon to receive a 15% discount: (100-15) * (1/100) = 0.85 she pays to 6% sales tax on item: (100 + 6) * (1/100) = 1.06 Therefore, the error is given by: (1.15) (1.06) (20) the term 1.15
B. Show or explain how you would calculate the total cost of Cait's purchase.
The total cost for this case is given by the following expression: (0.85) (1.06) (20) Calculating we have: $ 18.02