Which expression have a vaule of -1/64?

(hurry! ) which expression is equivalent to the following complex fraction?

Write an equation in point-slope form for the line through the given point that has the given slope (-2,-7); m=-3/2

Consider circle c with angle acb measuring 3/4 radians.if minor arc ab measures 9 inches, what is the length of the radius of circle c? if necessary, round your answer to the nearest inch.