Final answer:
Gregg drives at a speed of 45 miles per hour when he covers 135 miles in 3 hours. Therefore, in 5 hours, Gregg can drive 225 miles, assuming his speed remains constant.
Step-by-step explanation:
The student has asked how far Gregg can drive in 5 hours if he drives 135 miles in 3 hours. To solve this, we need to calculate Gregg's average speed and then use it to determine the distance he can cover in 5 hours. The average speed can be found using the formula:
Vavg = distance/time
Giving us: Vavg = 135 miles / 3 hours = 45 miles per hour
Now, to find out how far Gregg can drive in 5 hours at this speed, we can use the same formula, rearranging it to solve for distance (distance = speed x time):
Distance = 45 miles/hour x 5 hours = 225 miles
Therefore, Gregg can drive 225 miles in 5 hours, given his average speed remains the same.