(1)A ball is moving in a straight line along the x-axis (units are in feet). it has an acceleration of 3t+1 feet

per second squared. it's velocity at time t=0 is 16 feet per second and it initially starts at x=7

1)find the time at which the object turns around after heading left.

2)determine whether the object is speeding up, slowing down, or neither, at t=5secods

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