The body mass index, I, can be determine an indivdual's risk for heart disease.

Question

An index less than 25 indicates a low risk.The body mass index is given by the formula, or model,

I= 700w/H to the 2 power, Where W=weight,in pounds, and H=height, in inches. francis weights 177 pounds and stands 75 inches tall. What is his approximate body mass? find an ineqality describing all weights W that Francis can habe and be in low-risk category.

Fracis' approximate body mass index is?

(round to the nearest number.)

Answer 1

A BMI lower than 20 will indicate an increased risk from some cause. Logically a BMI of zero would indicate a risk of infinite size.

However:

BMI = (700X177)/75^2 = 22

Let BMI = (700w)/75^2 = 25

700w = 25 X 75 X 75

700w = 46875

w = 66.96

The question suggests that Francis will be at low risk if his body mass is below 70

i.e. w < 70 Ans