The picture shows a barn door: a barn door has two parallel bars. a support ab of length 6 feet runs across the diagonal between the two parallel bars. the angle made by the diagonal with the parallel bar on top is 60 degrees. what is the length of the bar ac?

a. 6 sin 60°
b. 6 cos 60°
c. 6/cos60
d. 6/tan60

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)