5. a car wash uses 50 gallons of water every
40 seconds. how much water does it use per
second?

It use 1.25 gallons of water per  second

Step-by-step explanation:

Amount of water used for car wash in 40 seconds = 50 gallons

Amount of water used for car wash in 1 seconds =

Amount of water used for car wash in 1 seconds =

So, Amount of water used in 1 second is 1.25 gallons

So, Unit rate = 1.25 gallons per second

Hence it use 1.25 gallons of water per  second

just take the area of the square and then the area of the circle then subtract the circle area from the squares area

step-by-step explanation: