Addison earns a fixed hourly rate working as a sales clerk. if she works on a holiday, she earns a different hourly rate than she earns on a regular day. in one week, she earns $188.50 by working 5 hours on a holiday and 16 hours during regular days. a different week, she earns $254.00 by working 8 hours on a holiday and 20 hours during regular days.

question: how much more is addison’s holiday hourly rate than her regular hourly rate?