Question

the polynomial 0.041h-0.018a-2.69 can be used to estimate the lung capacity, in liters, of a female with height h, in centimeters, and age a in years. Find the lung capacity of a 20 year old woman who is 170 centimeters tall?

Answer 1

h= 170cm
a=20

0.041(170)-0.018(20)-2.69 = lung capacity
6.97 - 0.36 = 6.61
6.61 -2.69 =3.92
3.92 liters

Answer 2

What Jlastino did was simply filling in the values in the polynomial you gave.

There are 2 variables: h and a. You have the h: 170cm and you have the a: 20 years.

Now substitute those values in your polynomial and perform the calculation.