Question

A particular dishwasher uses 444 gallons of water per load. Their advertising claims that hand washing the dishes uses 666 times as much water. According to this estimate, how many gallons of water would it save to wash 215215215 loads using the dishwasher instead of by hand

Answer 1

Answer: 6.35444444×10^13 gallons

Step-by-step explanation:

So a dishwasher uses 444 gallons of water per load.

That means it'll use 444*215215215 = 95555555460 gallons of water for 215215215 loads

Since washing dishes by hand takes 666 as much as water in comparison to using a dishwasher, we can do 95555555460x666 to find that you need 6.36399999×10^13 gallons of water to wash 215215215 loads.

The question asks for how much more water in gallons you can save, so do 6.36399999×10^13 - 95555555460 to get 6.35444444×10^13 gallons