water a dripping faucet wastes 3 cups of water every 24 hours. how much water is wasted in a week? cups

Explanation:

Step1: Determine number of hours in a week

There are 7 days in a week and 24 hours in a day, so the total number of hours in a week is $7\times24 = 168$ hours.

Step2: Find the amount of water wasted

The faucet wastes 3 cups in 24 hours. Let $x$ be the amount of water wasted in 168 hours. We set up a proportion $\frac{3}{24}=\frac{x}{168}$. Cross - multiply gives $24x=3\times168$. Then $x = \frac{3\times168}{24}=21$.

Answer:

21