Question

A golf course in Phoenix, Arizona, uses an average of 80 million gallons of water daily for irrigation. An average family of four (also living in Phoenix, AZ) uses 325,851 gallons of water per year. Rounded to the nearest ten, how many families of four can one golf course provide water for?

Answer 1

80,000,000 gallons/day × 365 days = 29,200,000,000 gallons/year.
29,200,000,000 ÷ 325,851 ≈ 89,611.51 families.
Rounded to the nearest ten: 89,610 families.