Question 536227
D=RT where r is the rate (speed) and T is the time.  The speed is given in km/h while the time for Ann's reaction is given in seconds.<P>
Convert km/h to km/s.<P>
There are 60 seconds in a minute and 60 minutes in an hour = 3600 seconds in an hour.  Divide km/h by 3600 s/h to get km/s. --->  km/(h*s/h) = km/s.<P>
55/3600 = .01528 km/s. <P>
D = .01528*.75 = .01146km.  Convert to meters with 1000 m/km (multiply).<P>
.01146*1000 = 11.46 meters before the car even begins slowing.<P>


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