Question

65 POINTS!!! Amy works at the Apple Store at a commission rate of 3%. Ipads are 18% off on Mac Mondays. She helps a customer who buys, 2 Ipads originally priced at $499, and an iPhone priced at $575. If all purchases are made on Mac Monday and the sales tax rate is 8.875 What is the total amount the customer will pay?

Students answer- $575 + 499 + 499 = 1573 times 1.0875 = $1710.64

Identify the students mistake in the given answer. Then explain why the answer is incorrect and give the correct way to do it.

Answer 1

Explanation:

I will answer but first answer this

Amar works as a customer service representative at Bell World, selling the new

iPhone 12 Pro Max. He earns $11.50/hour, a plus 15% commission on all iPhone

12 Pro Max’s he sells.

a. Create an algebraic equation to represent Amar’s earnings. Define all

variables.

b. What was the value of Amar’s iPhone 12 Pro Max sales if he worked for

5.5 hours and earned $854.42?

Answer 2

1. The first mistake was in not taking 18% off the iPad price. A second mistake was in using an incorrect value for the sales tax multiplier. Those two mistakes together are why the answer is incorrect.
2. ($575 +0.82·2·499)·1.08875 = $1517.02

Explanation:

iPads are 18% off on the day of purchase, so they should be charged at ...

100% -18% = 82%

of full price. The sum shown includes two iPads at $499 each, without any discount. The total price is too high by $179.64.

The tax rate is given as 8.875%, so the multiplier on price will be ...

100% +8.875% = 108.875% = 1.08875

The multiplier used by the student in the problem is 1.0875, so is too low.

_____

A correct computation could be written as ...

($575 + 2×499×0.82)×1.08875 ≈ $1517.02