Final answer:
Angela earned $304 and Kelly earned $570 last week.
Step-by-step explanation:
To calculate the amount of money Angela and Kelly earned last week, we need to multiply their hourly rates by the number of hours they worked. Angela earns $8 per hour, so she earned 38 hours * $8 = $304. On the other hand, Kelly's earning is modeled by the function f(x) = 15t, where t represents hours worked. Since Kelly also worked 38 hours, we can substitute t = 38 into the function to calculate her earnings. Kelly earned $15 * 38 = $570. Therefore, the correct answer is D) Angela earned $8 more than Kelly per hour, so Angela earned $304, and Kelly earned $570.