Problem B

Server Satisfaction

Youâ€™ve just enjoyed a delicious meal at a restaurant with your friend. The cost of the meal before tax and tip was \(\$35.10\).

Suppose the tax is \(15\%\) of the total cost. Estimate the dollar amount of tax using a mental math strategy. Then calculate the actual dollar amount of tax, and total cost including tax.

If you want to tip the server an additional \(20\%\) after tax, how much would you pay in total?

How much change would you receive if you paid with a \(\$100\) bill?

**Extension:** Suppose
you are a server. In general, when would you rather receive a \(\$20\) tip instead of \(20\%\) of your bill? Justify your
thinking.

**Theme: **Number Sense