Water is being drained out of a swimming pool at a constant rate of 780 gallons per hour. the swimming pool initially contained 45,000 gallons of water. a chemical additives must be added to the pool when it has no more than 15,000 gallons of water remaining in the pool. write an expression for the amount of water remaining in the pool after blank amount of hours.

W = 45000 - 780h

Step-by-step explanation:

There were 45000 gallons of water in the swimming pool initially.

Given that at a constant rate i.e. 780 gallons of water per hour is being drained out of the swimming pool.

When the pool has no more than 15,000 gallons of water remaining a chemical additive must be added with water.

Therefore, the equation that gives the remaining water after h hours in the pool is  

W = 45000 - 780h (Answer)

d

step-by-step explanation:

so, converting firstly the mixed fractions to improper fractions and then "adding".