Find the standard equation of the parabola which satisfies the given conditions. 7. vertex (7, 11), focus (16, 11) 8. vertex (-10, -5), directrix y = -1 (-10, -2) 11 9. focus directrix y = - 2 37 10. focus 101 00 3 , directrix I = 2 11. axis of symmetry y = 9, directrix r = 24, vertex on the line 3y - 5x = 7 12. vertex (0, 7), vertical axis of symmetry, through the point P(4, 5) 13. vertex (-3, 8), horizontal axis of symmetry, through the point P(-5, 12) 14. A satellite dish shaped like a paraboloid has its receiver located at the focus. How far is the receiver from the vertex if the dish is 10 ft across and 3 ft deep at the center? 15. A flashlight shaped like a paraboloid has its light source at the focus located 1.5 cm from the base and is 10 cm wide at its opening. How deep is the flashlight at its center