In greek time, who created a formula to find the third side of a triangle? ​

How did inca develop their road system? a) they used mortar to hold the stones together.b) they built suspension bridges over rivers. c) they mixed copper and stone together to make the blocks.d) they laid roads in the cities, not in the less densely populated deserts.

In an industry in which there are several providers of a type of good, why can one business not charge much higher prices for their goods?

Which two sentences in this passage talk about china’s efforts to curb environmental degradation?