15 15 Local Extrema, Applied A Next week, we will look at some applications of Local Extrema, but we will do a simple example here that doesn't require much setup. Solve each part, providing explanations wherever necessary. Suppose you throw launch a ball into the air, and its height is given by the function h(t)=-4.9t² + 60t+5 where his in meters and t is seconds after you launch the ball. Do the following: A. Find the velocity of the ball at time t B. At some point the ball is going to start falling back down. What is the velocity of the ball at the moment it stops going up and starts going down? Hint: you should not do any math to answer this part of the question; think about what you would actually see the ball do at this moment. C. Using your answer to parts A and B, find the time t that the ball starts falling D. Find the height of the ball when it starts falling E. Graph h, and describe how what you see relates to your answers to parts A-D F. Now, consider the following prompt: "Find the maximum height of the ball." What we did for parts A-D is actually how we would answer this question. Compare your process for this discussion post to what we learned in section 4.3.

You run along a path at a constant speed of 4.7 mph. How far do you travel in 1.7 hrs? In 3.8 hours?

The fare for a taxi is $7.50 plus $0.40 per mile. Coach Woodside paid a total fare of $31.50 to take a taxi from Jackson to his house.(His car broke down & no one would give him a ride). What is the distance, in miles, from Jackson to his house? 15 20 30 60 D00 D00 F4 F5 EZ $ & 4 6 7 8 9

If Oscar the ostrich travels 80 miles in 2 hours on land, how fast does he travel?   A. 41 mph B. 38 mph C. 160 mph D. 40 mph