SOLUTION: The function D(t)=18t2β130t gives the distance a car going a certain speed will skid in t seconds. Find the time it would take for the car to skid 150 feet.
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Question 1195776: The function D(t)=18t2β130t gives the distance a car going a certain speed will skid in t seconds. Find the time it would take for the car to skid 150 feet.
Found 2 solutions by MathLover1, ikleyn:
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
given: feet
.......use quadratic formula
exact solutions:
->
or
->
approximately:
seconds
or
-> disregard negative solution, time cannot be negative
so, the time it would take for the car to skid feet is approximately seconds
Answer by ikleyn(52835) (Show Source): You can put this solution on YOUR website!
.
As the problem is posed, it is nonsense, since the given function is NEGATIVE
at 0 < t < = 7.22... seconds, and CAN NOT represent traveled distance,
which is always positive, due to meaning of this conception/notion.
Keeping it in mind, ignore the solution from the other tutor,
for safety of your brain.
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