an athletic facility is building an indoor track. the track is composed of a rectangle and two semicircles, as shown. a) write a formula fir the perimeter of the indoor track. b) solve the formula for x. c) the perimeter of the track is 660 feet, and r is 50 feet. find x. round your answer to the nearest foot.

The table below represents the displacement of a fish from its reef as a function of time: time (hours) x displacement from reef (feet) y 0 4 1 64 2 124 3 184 4 244 part a: what is the y-intercept of the function, and what does this tell you about the fish? (4 points) part b: calculate the average rate of change of the function represented by the table between x = 1 to x = 3 hours, and tell what the average rate represents. (4 points) part c: what would be the domain of the function if the fish continued to swim at this rate until it traveled 724 feet from the reef? (2 points)

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.