1. Locatethe standard form of the equation of the parabola with a focus at (0, -10) and a directrix at y = 10.

A. y = negative 1 divided by 10x2

B. y = negative 1 divided by 40x2

C. y2 = -40x

D. y2 = -10x

2.A radio telescope has a parabolic surface, as shown below.

A parabola opening up with vertex at the origin is graphed on the coordinate plane. The height of the parabola from top to bottom is 1 meter and its width from left to right is 12 meters.

If the telescope is 1 m deep and 12 m wide, how far is the focus from the vertex?

A. 1 m

B. 36 m

C. 3 m

D. 9 m

3. Determine two pairs of polar coordinates for the point (3, 3) with 0 < 360.

A. (3 square root 2, 315), (-3 square root 2, 135)

B. (3 square root 2, 135), (-3 square root 2, 315)

C. (3 square root 2, 45), (-3 square root 2, 225)

D. (3 square root 2, 225), (-3 square root 2, 45)

4. Locate the standard form of the equation of the parabola with a focus at (5, 0) and a directrix at x = -5.

A. y = 1 divided by 20x2

B. 20y = x2

C. x = 1 divided by 20y2

D. y2 = 20x