# Questions & Answers

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- The base of S is an elliptical region with boundary curve 9x^2+4y^2=36. Cross-sections perpendicular to the x-axis are isosceles right triangles with hypotenuse in the base. Find the volume of the Solid.
- Find an explicit description of nul A by listing vectors that span the null space.
- A -10.0 nC point charge and a +20.0 nC point charge are 15.0 cm apart on the x-axis. Find the following:
- Find an orthogonal basis for the column space of the matrix given below:
- Prove that if m and n are integers and m x n is even, then m is even or n is even.
- If xy+8e^y=8e , find the value of y” at the point where x=0.
- If xy+6e^y=6e, find the value of y” at the point where x=0.
- Estimate the angle to the nearest one-half radian.
- Construct a matrix whose column space contains (1, 1, 5) and (0, 3, 1) while it’s null space contains (1, 1, 2).
- Find the rate of change of f at p in the direction of the vector u.
- Each limit represents the derivative of some function f at some number a.
- Describe all solutions of Ax=0 in parametric vector form, where A is row equivalent to the given matrix.