Answer asap! only one question! must be correct for points to be given! question is in da attached screenshot! provide your answer numbered. example:
1. (answer)

A20? -foot ladder is placed against a vertical wall of a? building, with the bottom of the ladder standing on level ground 19 feet from the base of the building. how high up the wall does the ladder? reach?

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

Problem fathi wants to print out a pdf document that is 48 pages long. to save paper, he decides to print on both sides of each sheet and to print two pages on each side of the sheet. how many sheets of paper will he need?