Please look at the picture and please let me know what is the right answer I DONT HAVE A LOT OF TIME PLEASE HURRY

Write the expression as a constant , a single trigonometric function, or a power of a trigonometric function. sin x cos x/ tan x

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Ametal rod needs to be 9 feet and 5.5 inches in length. the sections of the poles being used are each 1 foot and 10.5 inches long. how many 1ft 10.5in sections would be needed to complete the 9ft 5.5in metal rod? and how many inches of material will be left?