The spread of a contaminant is increasing in a circular pattern on the surface of a lake. The radius of the contaminant can be modeled by 
, where r is the radius in meters and t is the time in hours since contamination.
?
Find a function that gives the area A of the circular lake in terms of the time since the spread began.
?
A. 
B. 
C. 
D. 
E. 
Answer: E
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Name the quadrant or axis in which the point lies.(-3, 8)
A. quadrant I B. quadrant II C. quadrant III D. quadrant IV
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A. {2008, 2009, 2010, 2011, 2012} B. {(2008, 22), (2009, 23), (2010, 25), (2011, 25), (2012, 27)} C. {22, 23, 25, 27} D. {(22, 2008), (23, 2009), (25, 2010), (25, 2011), (27, 2012)}
Find the coordinates of the vertex for the parabola defined by the given quadratic function.f(x) = (x + 4)2 + 9
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