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The function C(w)=0.013w^2-w-7 estimates the wind chill temperature C(w) at 0 degrees F for wind speeds w from 5 to 30 mile per hour. Estimate the wind chill temperature at 0 degrees F if the wind speed is 20 miles per hour.

Respuesta :

Edufirst
c(w) = 0.013w^2 - w  - 7

w = 20mph => c(20) = 0.013(20)^2 - 20 - 7 = -21.8 °F

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