Question

For each babysitting job, Tamar charges $6 for bus fare plus $8 per hour. She only accepts babysitting jobs if the total charge is at least $30. What is the minimum number of hours for a babysitting job she would accept?
2 and one-half hours
3 hours
4 hours
4 and one-half hours

Answer 1

Let h be hours. Total charge = 6 + 8h. Require 6 + 8h ≥ 30 → 8h ≥ 24 → h ≥ 3.

Minimum is 3 hours.