Show that, for any constants a and b, the set D = {(t, y) \ a < t < b, oo < y < oo} is convex

Midterm #1, 141, Schwartz Name_____________________Graded on COMMUNICATION of physics From the timeline for week 4, day 3, I have: My take on how to know which lens you're to use: 1) ENERGY: When there is a before and after that converts energy. Such that everything you're interested in (like height and speed) have a corresponding energy...