SOLUTION: an emperor penguin travels a distance of 70 miles each year back to the place of its birth. If that same penguin moves at a speed of 2.4 miles per hour, the function d = 70 - 2.4

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: an emperor penguin travels a distance of 70 miles each year back to the place of its birth. If that same penguin moves at a speed of 2.4 miles per hour, the function d = 70 - 2.4      Log On


   

Question 1155659: an emperor penguin travels a distance of 70 miles each year back to the place of its birth. If that same penguin moves at a speed of 2.4 miles per hour, the function d = 70 - 2.4t represents its distance d from its birthplace t hours after it has started its journey home. Find the zero of this function.

Answer by ikleyn(52900) About Me  (Show Source):
You can put this solution on YOUR website!
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To find the zero of this function, solve an equation


    d = 0,  which is  70 - 2.4*t = 0.


The solution is  t = 70%2F2.4 = 29.1666... = 291%2F6 hours = 29 hours and 10 minutes.


It is the travel time for this distance.