Question

The dosage of a cold medication is 2 mg for every 80 lb of body weight. How many milligrams of this medication are required for a person who weighs 140 lb? mg

Answer 1

Let x represent the amount of milligrams required for a person who weighs 140 lb.

We were told that the dosage of a cold medication is 2 mg for every 80 lb of body weight. The equations would be set up as shown below

2 = 80

x = 140

By crossmultiplying, we have

x * 80 = 2 * 140

80x = 280

We would divide both sides of th equation by 80. We have

80x/80 = 280/80

x = 3.5

Therefore, 3.5 milligrams of this medication are required for a person who weighs 140 lb