Final answer:
Cheryl earns $0.85 more for one hour of overtime than Colby.
Step-by-step explanation:
To determine who earns more for one hour of overtime, we need to calculate the overtime pay for both Colby and Cheryl. Colby earns $8.90 per hour, so his overtime pay would be $8.90 x 1.5 = $13.35 per hour. Cheryl earns $7.10 per hour, so her overtime pay would be $7.10 x 2 = $14.20 per hour.
Therefore, Cheryl earns more for one hour of overtime. The difference between their overtime pays is $14.20 - $13.35 = $0.85.
So the correct answer is B) Cheryl, $0.85 more.