Question

A restaurant customer left $0.70 as a tip. The tax was 4% and the tip was 10% of the cost including tax. a. Which information is not needed to compute the bill after tax and tip?

Answer 1

The original cost of the meal is not required to compute the bill after tax and tip if the tip amount is already known. To compute the total bill with given tax and tip percentages, you would calculate the tax, determine the tip based on the meal cost including tax, and sum it all up.

Step-by-step explanation:

To answer the student's question: The information that is not needed to compute the bill after tax and tip when you know the tip amount is the original cost of the meal. The specific dollar amount of the tip is given ($0.70), and we know it represents 10% of the total cost (meal plus tax).

The tax rate is also provided (4%). However, to calculate the total bill using these percentages, you'd normally need to know the original meal cost before tax and tip, but since the tip amount is given directly, the original cost isn't required.

If you had to calculate Jerod's total bill at the restaurant with a sales tax of 4% and a tip of 10%, you would use the following steps:

1. First, figure out the sales tax by converting the percent to a decimal and then multiplying by the total cost of the meal.
2. Next, calculate the tip by converting the percent to a decimal and multiplying by the cost of the meal including the tax.
3. Add the original cost of the meal, the tax, and the tip to find the total amount paid.