Find the magnitude.Let u = 
. Find the magnitude (length) of the vector: 5u.
A. 5
B. -5
C. 5
D. 
Answer: C
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Find the volume of the solid generated by revolving the region about the given axis. Use the shell or washer method.The triangle with vertices (0, 0), (0, 2), and (2, 2) about the line x = 2
A. 
?
B. 
?
C. 
?
D. 
?
Transform the polar equation to an equation in rectangular coordinates. Then identify and graph the equation.r sec ? = -6
A. 
x = -6; vertical line 6 units
to the left of the pole
B. 
y = -6; horizontal line 6 units
below the pole
C. 
(x + 3)2 + y2 = 9; circle, radius 3
center (-3, 0) in rectangular coordinates
D. 
x2 + (y + 3)2 = 9; circle, radius 3,
center at (0, -3) in rectangular coordinates
Find the indicated function value.
?Find f(-2)
A. 5 B. 21 C. 17 D. 9
Solve the system of equations algebraically for real values of x and y.
?
?
Please enter your answer as ordered pairs in the form 
, 
.... The pairs must be separated by commas.
What will be an ideal response?