Chapter 3.4, Problem 35HP

To determine

To calculate: The cost of dinner including the tip.

Answer to Problem 35HP

The cost of dinner including the tip is $\$70.2$.

Explanation of Solution

Given information:

The bill of the dinner paid by a family was $60 including tax. The tip left by them was $17\%$ of total cost of bill.

Calculation:

Consider the bill of the dinner paid by a family was $60 including tax. The tip left by them was $17\%$ of total cost of bill.

Now, $17\%$ of $60 is,

Recall that for the matrix of order $2\times 2$ ,

  $\frac{17}{100}\times 60=10.2$

Therefore, tip left by the family was $\$10.2$.

Now, the total amount spent by family was,

  $60+10.2=70.2$

Thus, the cost of dinner including the tip is $\$70.2$.