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Struggling

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hi all having a problem with this question:

The position of a rabbit along a straight tunnel as a function of time is plotted: http://img284.imageshack.us/img284/5764/untitled0vz.png [Broken]

1. What is its instantaneous velocity at t = 10.0s and t=30.0s

2. what is the average velocity:

between t = 0 and t = 5.0s

between t = 25.0s and t = 30.0s

between t = 40.0s and t = 50.0s

i can do it when they give an equation. and i know it has to all do with tangents and all that, i can get the results by "estimating", but not as accurate. im totally stuck with this one any help at all will be appreciated.

thanks

The position of a rabbit along a straight tunnel as a function of time is plotted: http://img284.imageshack.us/img284/5764/untitled0vz.png [Broken]

1. What is its instantaneous velocity at t = 10.0s and t=30.0s

2. what is the average velocity:

between t = 0 and t = 5.0s

between t = 25.0s and t = 30.0s

between t = 40.0s and t = 50.0s

i can do it when they give an equation. and i know it has to all do with tangents and all that, i can get the results by "estimating", but not as accurate. im totally stuck with this one any help at all will be appreciated.

thanks

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