Graph the ellipse and locate the foci.16x2 + 4y2 = 64
A. foci at (
, 0) and (-
, 0)
B. foci at (2
, 0) and (-2
, 0)
C. foci at (2
, 0) and (-2
, 0)
D. foci at (0, 2
) and (0, -2
)
Answer: D
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Sketch the graph and show all local extrema and inflection points.y = |x2 - 5x|
A. Local minima: (0, 0), (5, 0)
Local maximum: 
No inflection points
B. Local maximum: 
Inflection points: (0, 0), (5, 0)
C. Local minima: (0, 0), (5, 0)
Local maximum: 
Inflection points: (0, 0), (5, 0)
D. Local minimum: 
No inflection points
Solve the problem.A borrower uses an income tax refund to pay off the balance on a fixed installment loan. Which rules or methods can be used to compute the amount of interest he will save?
What will be an ideal response?
Find the domain of the rational function.f(x) = 
A. all real numbers except ±9
B. all real numbers except ±9, 
C. all real numbers except 9
D. all real numbers except 81
Use the quadratic formula to solve the quadratic equation.
+ x + 
= 0
A. -6 ± 
B. 6 ± 
C. -6 ± 
D. 12 ± 