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**turtle** I have a test tomorrow, and I would really appreciate any help on the following problems. Thanks a lot!!!!

1. A particle moves on a straight line so that its velocity at time t is given by v = 4s, where s is its distance from the origin. If s = 3 when t = 0, then when t = 1/2, s = ...

2. A particle moves along a line so that its acceleration, a , at time t is a = -t^2. If the particle is at the origin when t = 0 and 3 units to the right of the origin when t = 1, then its velocity at t = 0 is...

Once again, thank you for any help!!!