SOLUTION: The motion of an autombile acceleration away from traffic light is represented by the funcitond(t) = 9t^2, where t is the time in seconds and d(t) is the distanct covered by the au

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons -> SOLUTION: The motion of an autombile acceleration away from traffic light is represented by the funcitond(t) = 9t^2, where t is the time in seconds and d(t) is the distanct covered by the au      Log On


   

Question 427178: The motion of an autombile acceleration away from traffic light is represented by the funcitond(t) = 9t^2, where t is the time in seconds and d(t) is the distanct covered by the automobile. Approximately how many seconds does it take for the automobile to travel 180 feet?
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The motion of an autombile acceleration away from traffic light is represented by the funciton d(t) = 9t^2, where t is the time in seconds and d(t) is the distanct covered by the automobile. Approximately how many seconds does it take for the automobile to travel 180 feet?
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d(t) = 9t^2 = 180
t^2 = 20
t =~ 4.472 seconds