(a) Find the slope of the tangent to the curve y=2√(x) at the point where x=a.
(b) Find equations of the tangent lines at the following points: (4,4)

Complete the question:

What is the slope of the tangent to the curve y=2√(x) at the point where x=a?
A) 2√(a)
B) √(a)
C) 1/√(a)
D) 1/(2√(a))

What are the equations of the tangent lines at the point (4,4)?
A) y=2x-4
B) y=2x+4
C) y=4x-16
D) y=4x+16