SOLUTION: Corbin was driving his car at a speed of r miles per hour, when he had to stop suddenly. It took the car 254 feet to stop. The formula relating the distance d in feet required to s
Algebra.Com
Question 598399: Corbin was driving his car at a speed of r miles per hour, when he had to stop suddenly. It took the car 254 feet to stop. The formula relating the distance d in feet required to stop to the speed r in miles per hour is d=0.05r(squared)+r. To the nearest mile per hour, how fast was Corbin traveling just before he braked?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Corbin was driving his car at a speed of r miles per hour, when he had to stop suddenly.
It took the car 254 feet to stop.
The formula relating the distance d in feet required to stop to the speed r in miles per hour is d=0.05r(squared)+r.
To the nearest mile per hour, how fast was Corbin traveling just before he braked?
:
d =
d = 254, find r
= 254
A quadratic equation:
= 0
Use the quadratic formula to find r
In this problem; x=r; a=.05; b=1; c= -254
Do the math and you should get a positive solution of:
r ~ 62 mph
RELATED QUESTIONS
Using the formula,, find the speed of a car in miles per hour if it took 150 feet to... (answered by richard1234)
At 60 miles per hour, a car travels 88 feet per second. During a stop from 60 miles per... (answered by Alan3354)
The distance it takes to stop a car varies directly as as the square of the speed of the... (answered by Fombitz)
The distance it takes to stop a car varies directly as the square of the speed of the... (answered by JulietG)
The distance it takes to stop a car varies directly as the square of the speed of the... (answered by stanbon)
The distance it takes to stop a car varies directly as the square of speed of the car.... (answered by JulietG)
The length of the skid mark of an automobile sliding to a stop is directly proportional... (answered by RAY100)
The Distance it takes a car to stop varies directly as the square of the speed of the... (answered by fractalier)
PHYSICS—ENGINEERING For a car traveling at a speed of v miles per hour, under the best... (answered by TimothyLamb)