Efficiency is a measure of how much of the work put into a machine is converted into useful output work. Why can efficiency never reach 100%? А) acceleration
B) elasticity
C)friction
D) gravity

1) the mayans built pyramids just like the egyptians. the mayans also used hieroglyphics like them.2) power was passed down by family. for example, if the father dies, the son would be the next king.3)they both built pyramids for their structures.4)the main crop for the mayans was maize.5)they also grew manioc, beans,  squash,  amaranth, and chile peppers.