Hindi grammar subject please help me

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

21/2 divided by 3 1/3 = s divided by 4 1/4 . what is s?

Using the returns shown above, calculate the arithmetic average returns, the variances, and the standard deviations for x and y. g