How to find probability with mean and standard deviation given?

F(x) = (x^2 + 3x − 4) and g (x) = (x+4) find f/g and state the domain.

The expression 6x2 gives the surface area of a cube, and the expression x3 gives the volume of a cube, where x is the length of one side of the cube. find the surface area and the volume of a cube with a side length of 6m

Evaluate cos2θ for cosθ = square root of 3/2