Which of the following best describes a single fixed point that is the same
distance from the parabola as the directrix is from the parabola?
A. Center
B. Focus
C. Vertex
D. Locus

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.

Perry observes the opposite parallel walls of a room in how many lines do the plains containing the walls intersect