hard · Enhanced ACT math

A worker earns 15 per hour for the first 40 hours worked in a week and 22.50 per hour for any overtime hours beyond 40.

If the worker's total pay for one week was 735, how many overtime hours did he work?

  1. 46 hours
  2. 6 hours
  3. 9 hours
  4. 15 hours

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