Math Crossword

4. a gradual decrease; as of stored charge or current
9. A plane curve having two branches, formed by the intersection of a plane with both halves of a right circular cone at an angle parallel to the axis of the cone. It is the locus of points for which the difference of the distances from two given points is a constant.
11. A polynomial has integer co-efficients, then every rational zero has P/Q
13. A plane curve formed by the intersection of a right circular cone and a plane parallel to an element of the cone or by the locus of points equidistant from a fixed line and a fixed point not on the line.
16. A number whose cube is equal to a given number.
17. A conic section whose plane is not parallel to the axis, base, or generatrix of the intersected cone.
18. A plane curve everywhere equidistant from a given fixed point.

1. unlimited value
2. Triangle with 3 equal sides
3. the theorem that the square of the hypotenuse of a right triangle is equal to the sum of the squares of the other two sides.
5. The exact middle point.
6. 2.1718
7. The product of all the positive integers from 1 to a given number.
8. The formula , which is used to find the distance between two points (x1, y1) and (x2, y2)
10. formula that gives the solutions of the general quadratic equation ax2 + bx + c = 0
12. A computer hacker learns from mysterious rebels about the true nature of his reality and his role in the war against its controllers.
13. 3.1415926
14. Rise/Run
15. An ordered list of numbers
19. A geometric figure formed by a point moving along a fixed direction and the reverse direction.