Question

The equation for the cross-section of a parabolic satellite TV dish is stated below, measured in inches. How far is the focus from the vertex of the cross-section? _____ in. Enter a number, rounded to the nearest tenth.

y=1/38x^2

Answer 1

The coordinates of the focus are (h,k+1/4a)(h,k+1/4a)

y=1/38*x^2
here h=0,k=0 ,a=1/38

so if we put values to find focus
focus(0,0+1/4*1/38)=(0,9.5)