ctyrector
09.01.2021 •
Mathematics
At the scene of an accident, police can estimate how fast a driver was driving at the moment of a crash by measuring the length of the skid mark that is created by the car's sudden breaking. Use the formula s = 19.6kd, where s is the speed of the car at the moment of the crash, in miles per hour, k is the coefficient of kinetic friction, and d is the distance, in feet, of the skid mark.
If police determine a skid mark is 128 feet on ice, find the speed of the car at the time of a crash.
Round your answer to two decimal places.
Answer = __ miles/hour
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Ответ:
-6=(slope)9-10
9*4/9=4
4-10=-6
slope=4/9
y=4/9x-10