Identify where f is increasing and where f is decreasing.f(x) = 4x - x2
A. increasing: (-?, 4]; decreasing [4, ?)
B. increasing: [2, ?); decreasing (-?, 2]
C. increasing: (-?, 2]; decreasing [2, ?)
D. increasing: [4, ?); decreasing (-?, 4]
Answer: C
Mathematics
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A. 
B. 
C. 
D. 
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A. - 
B. 
C. - 
D. -2
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Graph the function.f(t) = sin 4?t 
A. 
B. 
C. 
D. 
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Solve the problem.A man earned $3000 the first year he worked. If he received a raise of $600 at the end of each year, what was his salary during the 15th year?
A. $12,000 B. $11,400 C. None of these D. $8400
Mathematics