How many total gallons of water will be released if 4 sprinkler heads spray at 25 gallons per minute for 15 minutes?

To determine the total amount of water released by the sprinkler heads, you first calculate the amount of water sprayed by a single head over the given duration. Each sprinkler head sprays 25 gallons per minute, and if it operates for 15 minutes, the calculation for one head would be:

25 gallons/minute × 15 minutes = 375 gallons per head.

Since there are 4 sprinkler heads working simultaneously, you then multiply the volume for one head by the total number of heads:

375 gallons/head × 4 heads = 1,500 gallons.

This calculation leads to the conclusion that when all four sprinkler heads operate at the specified rate, they will collectively release a total of 1,500 gallons of water over the 15-minute duration. This is why the correct answer is one of the provided options that corresponds to this total volume.