Sadie earns $11.25 per hour. Do her earnings vary inversely or directly with her number of hours worked? Determine how many hours she worked in a week if her earnings were $146.25.

If Sadie earns $11.25 per hour, her earnings will vary directly with the number of hours that she has worked per week.

If she made $146.25 in a work week, she worked 13 hours.

13 hours x 11.25 = 146.25

Your answer is 13 hours