Algebra-1

Question Analysis
This question tests the student's ability to calculate the unit rate, specifically the filling rate of a water tank. The problem provides the total volume of water and the time taken, and the student needs to divide the volume by the time to find the filling rate.

Key Concept Explanation
The key concept here is the definition of a unit rate, which is the ratio of one quantity to another, expressed as a single unit of the second quantity. In this case, it is the filling rate in gallons per minute.

Step-by-step Solution
1. Identify the quantities: Total volume of water = 750 gallons, Time = 15 minutes
2. Calculate the filling rate:

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