Find the equation of a line, in slope intercept form of a line that passes through the point (9,2) and is perpendicular to the line 2x-y=8

1. are the triangles similar and if so why? what is the value of x? show your work.

Is the power produced directly proportional to the wind speed, give reasons for your answer?

Gravel is being dumped from a conveyor belt at a rate of 25 ft3/min, and its coarseness is such that it forms a pile in the shape of a cone whose base diameter and height are always equal. how fast is the height of the pile increasing when the pile is 14 ft high? (round your answer to two decimal places.) ft/min