Derivative of square roots and composition functions

[tmoney369]

how do i take the derivative of sqr(4 + sqr(3x))?
My teacher wants me to do it as a chain rule composition function so i separated it into

F(x)= (4+x)^1/2 and G(x)= (3x)^1/2

but i don't know where to go from here because i don't know how to take the derivative of f(x)

 

[td10]

on F(x) you must use the power rule then go inside your function and take the derivative