Sam worked on his science fair project for 1/4 hour on friday and 1/2 hour on saturday. what are four common denominators for the fractions? explain your reasoning.

Aconstruction worker needs to put a rectangular window in the side of a building he knows from measuring that the top and bottom of the window have a width of 8bfeet and the sides have a length of 15 feet he also measured one diagonal to be 17 feet what is the length of the other diagonal