Question

To disinfect 1 quart of stream water to make it drinkable, you need to add 2 tablets of iodine. How many tablets do you need to disinfect 4 quarts?

Answer 1

8 tablets

Explanation:

Answer 2

x = 8 tablets are needed to disinfect 4 quarts

Explanation:

Write and solve an equation of ratios:

1 2 tablets

----- = ---------------

4 x

Cross-multiplying, we get x = 8 tablets are needed to disinfect 4 quarts