Specify the domain of the function.f(x) = 
A. x ? -5, x ? -8, x ? 4
B. All real numbers
C. x ? -5, x ? -8, x ? 4
D. x > 0
Answer: A
Mathematics
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Find the length of the curve.y = 
, 4 ? x ? 7
A. 22
B. 12
C. 33
D. 
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Evaluate the improper integral.
A. - 
ln8 + 4
B. 8 ln8 - 4
C. 8 ln8 - 8
D. 8 ln2 - 4
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Find the vertex, focus, and directrix of the parabola with the given equation.(x + 1)2 = 20(y + 3)
A. vertex: (-1, -3) focus: (-1, -8) directrix: x = 2 B. vertex: (-3, -1) focus: (-3, 4) directrix: y = -6 C. vertex: (1, 3) focus: (1, 8) directrix: y = -2 D. vertex: (-1, -3) focus: (-1, 2) directrix: y = -8
Mathematics
Simplify the expression.
- csc x
A. 0 B. tan x C. sec x D. 1
Mathematics