The number 1,000,000 is a exponent of 10

Guests at an amusement park must be at least 54 inches tall to be able to ride the roller coaster. which graph represents the set of heights that satisfy this requirement?

For g(x) = 5x - 3 and h(x) = [tex]\sqrt{x}[/tex], find (g · h)(4)

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