Free points for the good pepoles :D

The parabola opens: y=√x-4 (principal square root) up down right left

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

Two cities a and b are 1400km apart and lie on the same n-s line. the latitude of city a is 23 degrees. what is the latitude of city b. the radius of the earth is approximately 6400km.