1. If the position of an object moving along a straight line is given by .  at time t find its acceleration.

4. Find the second derivative of the given function. In each cas, use the appropriate notation for the second derivative and simplify our answer. You needn’t factor your answer.

5. Find the equation for the tangent line to the given curve at the point where x=1.

6. It is estimated that t years fron now, the population of a certain suburban community will be  thousand.  Derive a formula for the rate at which the populaion will be changing with respect to time t years fron now.