Question

A barber working 8hours a day must make $10 an hour to cover his expenses. Suppose he makes $12 per haircut . How many haircuts must he do each day (8 hours) to ensure he will cover his expenses

Answer 1

10 x 8 gives you $80 per day.

$12 per haircut
80/12 = 6.7
 
Round 6.7 to the nearest tenth which gives you 7

The barber must do 7 haircuts each day to ensure that he will cover his expenses.