Give the focus, directrix, and axis for the parabola.x2 = 4y
A. (0, 1), y = -1, y-axis
B. (1, 0), x = 1, x-axis
C. (0, -1), x = -1, x-axis
D. (1, 0), y = 1, y-axis
Answer: A
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Find the slope of the line through the pair of points.(-3, -7) and (2, -8)
A. 5
B. 
C. - 
D. - 5
Solve the problem.Let H be the set of all polynomials having degree at most 4 and rational coefficients. Determine whether H is a vector space. If it is not a vector space, determine which of the following properties it fails to satisfy.A: Contains zero vectorB: Closed under vector additionC: Closed under multiplication by scalars
A. H is not a vector space; not closed under vector addition B. H is not a vector space; not closed under multiplication by scalars C. H is a vector space. D. H is not a vector space; does not contain zero vector
Write in decimal notation.3.0561 × 10-7
A. 0.000000030561 B. 0.00000030561 C. 0.0000030561 D. -305610,000
Find the domain of the rational expression.f(v) = 
A. {v|v is a real number and v ? 2}
B. 
C. {v|v is a real number and v ? 0}
D. {v|v is a real number and v ? 0 and v ? -8}