Black ice is an ice covering on roads that is especially difficult to see and therefore extremely dangerous for motorists. The distance that a car traveling at 30 mph will slide after its brakes are applied is related to the outside temperature by the formula

C =

1

4

D − 45,

where C is the Celsius temperature and D is the distance in feet that the car will slide.

Determine the distance a car will slide on black ice when the outside temperature is

−3°C.