You should ask your parent/guardian
or teacher if needed! Merry Christmas!
You can use trigonometry and the tangent to get:
tan(11°)=150/x
so x=772 ft
30 circuits is 10% of 300 circuits
The vertex of this parabola has coordinates (1,-1).
The axis symmetry goes trough the vertex. The equation of the axis of symmetry is x=1.