Solve the inequality.(a + 7)(a + 5)(a + 4) > 0
A. (-4, ?)
B. (-7, -5) or (-4, ?)
C. (-?, -5)
D. (-?, -7) or (-5, -4)
Answer: B
Mathematics
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Evaluate the spherical coordinate integral.
A. 
B. 10
C. 10?
D. 
?
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Perform the indicated operation and simplify. Write the answer in the form a + bi.(5 - 8i)2
A. -39 B. 10 - 16i C. -39 - 80i D. 25 + 64i
Mathematics
Find the unit vector that has the same direction as the vector v.v = 5i
A. u = 5i
B. u = 25i
C. u = i
D. u = 
i
Mathematics
List the potential rational zeros of the polynomial function. Do not find the zeros.f(x) = x5 - 4x2 + 3x + 21
A. ± 1, ± 7, ± 3, ± 21
B. ± 1, ± 7, ± 3
C. ± 1, ± 
, ± 
, ± 
, ± 7, ± 3, ± 21
D. ± 1, ± 
, ± 
, ± 
Mathematics