Question

The function c(w)=0.013w^2-w-7 estimates the wind chill temperature c(w) at 0F for wind speeds w from 5 to 30 miles per house estimate the wind chill temperature at 0f if the wind speed is 20 miles per hour

Answer 1

For this case, the first thing we should use is the following equation:
 c (w) = 0.013w ^ 2-w-7
 We note that w = 20 belongs to the interval [5, 30]. Therefore, we can use the equation.
 Substituting w = 20 we have:
 c (20) = 0.013 * (20) ^ 2- (20) -7
 c (20) = - 21.8
 Answer:
 the wind chill temperature at 0f if the wind speed is 20 miles per hour is:
 c (20) = - 21.8