Final answer:
Evan earned $169.10 last week when he worked for 18 hours.
Step-by-step explanation:
Evan earns $9.45 each hour he works. To find out how much he earned last week when he worked for 18 hours, we can multiply his hourly rate with the number of hours he worked:
Hourly rate: $9.45
Number of hours worked: 18
Earnings = Hourly rate x Number of hours worked
Earnings = $9.45 x 18
Earnings = $169.10
Therefore, Evan earned $169.10 last week when he worked for 18 hours.