Question

A swimming pool is draining at a constant rate of -3.5 inches every two hours what is the change in the level after 9 hours

Answer 1

15.75

Explanation:

First multiply -3.5 by 4 to get 14 which is the number of inches it drained in 8 hours. Then divide 3.5 by 2 to get the unit rate (the number of inches it drains in one hour) and add that to 14 to get 15.75!

(P.S. Nice to find someone who is doing the same thing as me in school )

Answer 2

Answer:-15.75 inches

Explanation:

First, since the pool is drained at a constant rate we can use the rate given (every two hours) to help us figure out how often the value (-3.5) is subtracted from the pool's total volume.

For this, we divide 9 by 2: 9/2=4.5

Where 4.5 is how many times the value changed by 3.5inches.

then we multiply how many(4.5) by how much(-3.5) to get the total value subtracted from the pool being:-15.75 inches.