Two airplanes leave chicago at the same time and fly in opposite directions. if one travels at 450 miles per hour and the other at 480 miles per hour, how long will it take for them to be 1,860 miles apart?

Iwill give brainliest. suppose tommy walks from his home at (0, 0) to the mall at (0, 5), and then walks to a movie theater at (6, 5). after leaving the theater tommy walks to the store at (6, 0) before returning home. if each grid square represents one block, how many blocks does he walk?