Can you anser the question number 6

You can find the constant of proportionality by finding the ratio of

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?