must handwrit.e all answers and show all steps and work

5. The position of an object at time t is given by s(t) = -8 - 9t. Find the instantaneous velocity at t = 1 by finding the derivative. (2 points) 3. Use the given graph to determine the limit, if it exists. (4 points) 10 -s -6 4 :42 Find ""1 '0') . 193 5. Give an example of a function with both a removable and a non-removable discontinuity. (2 points) All changes saved 19. A railroad tunnel is shaped like a semiellipse, as shown below. The height of the tunnel at the center is 54 ft, and the vertical clearance must be 18 ft at a point 8 ft from the center. Find an equation for the ellipse. (5 points) B i U Font Family 20. Determine if the graph is symmetric about the x-axis, the y-axis, or the origin. r = 8 cos 30 (5 points) B i U Font Family AVA DE E E .OG