SOLUTION: The formula for calculating the braking distance needed when traveling at a certain speed is d=x^2/20 + x, where x is the speed of the car and d is the stopping distance. Calculat
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Question 181931: The formula for calculating the braking distance needed when traveling at a certain speed is d=x^2/20 + x, where x is the speed of the car and d is the stopping distance. Calculate the stopping distance required when a car traveling 20 mph, 40 mph, 60 mph, and 60 mph.
My answers are not coming up correct. Can you explain each step in this problem so I can see what I am doing wrong? Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! The formula for calculating the braking distance needed when traveling at a certain speed is d=x^2/20 + x, where x is the speed of the car and d is the stopping distance. Calculate the stopping distance required when a car traveling 20 mph, 40 mph, 60 mph, and 60 mph.
:
:
d = + x
:
20 mph:
d = + 20
d = + 20
d = 20 + 20
d = 40'
:
60 mph
d = + 60
d = + 60
d = 180 + 60
d = 240'
:
you should be able to do it for 40 mph and 80 mph the same way
