WILL MARK BRAINLIEST ASAP!
Given cosx= 4/5 when (3π/2) < x<2π find sin2x

A. 18/24

B -18/25

C.-1/5

D. -24/25

At a sand and gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 16 cubic feet per minute. the diameter of the base of the cone is approximately three times the altitude. at what rate is the height of the pile changing when the pile is 12 feet high? (hint: the formula for the volume of a cone is v = 1 3 πr2h.)

David must install fencing around a lot that is shaped like a right angle.the side of lot that runs east-west is 200 ft long.the side of the lot runs north-south is 125 ft long.calculate how many feet of fencing he will need to surround the entire lot.

Which expression gives the area of the triangle shown below