For a spa holding 700 gallons of water, how many days will it take to replace the water with five bathers per day?

To determine how many days it will take to replace the water in a spa holding 700 gallons with a usage of five bathers per day, we first need to establish how much water each bather contributes to the overall water replacement.

Typically, a bathing session can use between 20 to 30 gallons of water per bather. For calculation purposes, let's assume an average of 25 gallons per bather. Therefore, for five bathers, the total amount of water they will correlate to each day is:

5 bathers/day × 25 gallons/bather = 125 gallons/day.

Next, we need to find out how many gallons are in the spa and how many days it would take to fully replace this volume with the daily usage:

To find the number of days needed to replace the spa water, we can take the total volume of the spa and divide it by the amount of water used per day:

700 gallons / 125 gallons/day = 5.6 days.

However, the question asks how long it takes to replace the entire 700 gallons if continuously displacing the water over an extended period. Given that there might be a misunderstanding or other complexities not directly addressed, we consider the option that represents the closest approximation in practical