Question

The human brain weighs about 1 lb for each 100 lb of body weight. What is the approximate weight to the nearest ounce of the brain of a person weighing 85 lb?

Answer 1

Well, this is a ratio problem so you do:

\[\frac{ 1 }{ 100 } = \frac{ x }{ 85 }\]

Cross multiply to solve for x.

Answer 2

.85 lbs

Answer 3

Yup, you got it :D

Answer 4

thanks! also if two towns are 540 km. apart. If the scale of a map is 2 cm to 50 cm, how far apart are the towns? would the answer be 21.6 cm???

Answer 5

Yup, you got it.