can you do calc 1

calc 1 

 the first question is this 2.1.4 in an emergency batman rushes to destroy a doomsday device 30 miles away turning on the rockets mounted on his batmoblie. His average speed is 200 mph. After saving the world, He leisurely cruises back to the batcave with an average speed of 100 mph. What is the average speed during the whole excursion?

IMG_5427 and IMG_5428 is problem 2.2 on the worksheet