Find the intervals over which the given function is increasing, is decreasing, or is constant.f(x) = -3x3
A. increasing on (-?, ?)
B. decreasing on (-?, 0), increasing on (0, ?)
C. constant on (-?, ?)
D. decreasing on (-?, ?)
Answer: D
Mathematics
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Find an algebraic expression for the given expression.cos(2 cos-1 x)
A. -1 B. 1 C. 2x2 - 1 D. 2x2 + 1
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Find an equation for the ellipse described.Focus at (0, -4); vertices at (0, ±8)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
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Solve the problem.Write four out of five students as a decimal and as a percent.
A. 8, 800% B. 0.8, 8% C. 0.8, 800% D. 0.8, 80%
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Factor the sum or difference of cubes.2c4 - 16c
A. 2c(c + 2)(c2 - 2c + 4) B. 2c(c - 2)(c2 + 2c + 4) C. 2(c + 2)(c2 - 2c + 4) D. c(c + 2)(c2 - 2c + 4)
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