Math - check answer

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Given v = 4t - 9t3, find the acceleration when t = 1 s.

acceleration in m/s2 =

My Answer

V'=4-27t2
V"= -54t
V"(1)= -54

acceleration in m/s2 = positive 54

Can you please confirm this is correct????

Thanks

  • Math - check answer -

    Your calculus is correct, but I can't confirm your positive acceleration.

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