Find the focus and directrix of the parabola with the given equation.y2 = 7x
A. Focus: 
, directrix: x = 
B. Focus: (7, 0), directrix: x = - 7
C. Focus: 
, directrix: x = - 
D. Focus: 
, directrix: y = - 
Answer: C
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Calculate the area of the surface S.S is the portion of the cylinder x2 + y2 = 25 that lies between z = 4 and z = 5.
A. 45? B. 90? C. 10? D. 5?
Suppose that a nonlinear system is composed of equations whose graphs are those described, and the number of points of intersection of the two graphs is as given. Make a sketch satisfying these conditions.A parabola and a hyperbola; one point
What will be an ideal response?
A vector v has initial point P and terminal point Q. Find the magnitude of 
.P(-15, -10), Q(-8, -3)
A. 98
B. 
C. 20
D. 7
Tell whether or not the relation is a function.{(-6,-5), (-6,1), (1,2), (3,-6), (7,7)}
A. Yes B. No