Find the focus and directrix of the parabola with the given equation.2x2 = -7y
A. Focus: 
, directrix: y = 
B. Focus: 
, directrix: x = 
C. Focus: 
, directrix: y = - 
D. Focus: 
, directrix: y = 
Answer: D
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Determine the values of x for which the function is continuous. If the function is not continuous, determine the reason.f(x) = 
A. Not continuous at x = 4; small change B. Continuous for all x C. Not continuous at x = 4, -4; function not defined D. Not continuous at x = 4; function not defined
Find the general solution of the equation. Express the solution explicitly as a function of the independent variable.7y6
- 4x= 0
A. y = 
B. y = -
C. y = 
D. y = -
Find |u x v| correct to three decimal places where |u|= 14, |v|= 9, ?? = 80°.
What will be an ideal response?
Solve the problem.Plot the point 
and find other polar coordinates (r, ?) of the point for which:(a) r > 0, -2? ? ? < 0(b) r < 0, 0 ? ? < 2?(c) r > 0 2? ? ? < 4? 
What will be an ideal response?