Final answer:
To find how much Tim earns per hour, we divide his total earnings by the total number of hours worked.
Step-by-step explanation:
To find how much Tim earns per hour, we need to calculate the total number of hours he worked over the two days and divide the total earnings by the total number of hours.
On Monday, he worked for 31/2 hours, which is equal to 3.5 hours. On Tuesday, he worked for 51/4 hours, which is equal to 5.25 hours.
So, the total number of hours worked over the two days is 3.5 + 5.25 = 8.75 hours.
To find how much Tim earns per hour, we divide his total earnings of $70 by the total number of hours worked: $70 / 8.75 hours = $8 per hour.
Therefore, Tim earns $8 per hour.