Algebra-1

Question Analysis
This question tests the student's ability to apply proportions to a real-world scenario involving speed and distance.

Key Concept Explanation
The key concept is the use of proportions to find the time required to travel a certain distance at a constant speed. The given speed (distance per time) is used to set up the proportion.

Step-by-step Solution
1. Identify the given speed: 150 miles in 3 hours, so the speed is .
2. Set up the proportion:

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