Graph the polar equation.r = 
Identify the directrix and vertices. 
A. directrix: 2 unit(s) below
the pole at y = -2
vertices: 
, 
B. directrix: 2 unit(s) above
the pole at y = 2
vertices: 
, 
C. directrix: 2 unit(s) to the right of
the pole at x = 2
vertices: 
, 
D. directrix: 2 unit(s) to the left of
the pole at x = -2
vertices: 
,
Answer: D
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Multiply and then, if possible, simplify by factoring.
A. 
B. 25x
C. 5
D. 5x
Use a calculator to approximate the square root to three decimal places. Check to see that the approximation is reasonable.
A. 3.159 B. 10.000 C. 3.162 D. 3.167
Solve the problem.A charged particle of mass m and charge q moving in an electric field E has an acceleration a given by 
where q and E are constants. Find 
.
A. 
= - 
B. 
= 
C. 
= qEm
D. 
= - 
Find the value of the expression using the given values.
for x = -6
A. -2
B. -6
C. 6
D. 2