Need some one to make sure that i did this right and if i have the wrong rule what is it and the rule had to work for all the numbers

Evaluate cos2θ for cosθ = square root of 3/2

A. plot the data for the functions f(x) and g(x) on a grid and connect the points. x -2 -1 0 1 2 f(x) 1/9 1/3 1 3 9 x -2 -1 0 1 2 g(x) -4 -2 0 2 4 b. which function could be described as exponential and which as linear? explain. c. if the functions continue with the same pattern, will the function values ever be equal? if so, give estimates for the value of x that will make the function values equals. if not, explain why the function values will never be equal.

Askateboard ramp is in the shape of a right triangle what is the height of the ramp