What is the solution of this logarithm?

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?

(05.03 mc) part a: explain why the x-coordinates of the points where the graphs of the equations y = 4x and y = 2x−2 intersect are the solutions of the equation 4x = 2x−2. (4 points) part b: make tables to find the solution to 4x = 2x−2. take the integer values of x between −3 and 3. (4 points) part c: how can you solve the equation 4x = 2x−2 graphically? (2 points)

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20