a new washing machine uses 40% less water tha...
a new washing machine uses 40% less water than an older model. a family used 1,200 gallons of water per month to run the old washing machine. about how much water will they use each month to run the new washing machine? a 580 gal b 360 gal c 840 gal d 720 gal
Answer
# Explanation:
## Step1: Find the percentage of water used by new machine
The new machine uses 40% less water. So it uses 100% - 40% = 60% of the water used by the old - model.
## Step2: Calculate the water used by new machine
The old - model uses 1200 gallons per month. The new machine uses 60% of 1200 gallons. We calculate 0.6×1200 = 720 gallons.
# Answer:
D. 720 gal