Factor.16 - 49m2
A. (4 - 7m)2
B. (4m - 7)(4m + 7)
C. (4 + 7m)2
D. (4 + 7m)(4 - 7m)
Answer: D
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Find div F.F(x, y, z) = (-8y - 2z)i + (-9x - 2z)j + (-9x - 8y)k
A. -16 - 18 - 4 B. 0 C. -16 - 4 D. -16 - 18
Solve the problem.Let D be the smaller cap cut from a solid ball of radius 9 units by a plane 2 units from the center of the sphere. Set up the triple integral for the volume of D in cylindrical coordinates.
A. 
B. 
C. 
D. 
The percentage of 18-to-25-year-old smokers in the United States has been declining at a constant rate since 1974. If about 47% of this group smoked in 1974 and about 29% smoked in 1994, find a linear equation that models this decline. If this trend continues, what percentage will smoke in 2007. ?
A. 0% B. 19.4% C. 2.7% D. 17.3% E. none of these
Solve the equation by the method of your choice. Simplify irrational solutions, if possible.(x + 4)(x + 1) = 28
A. {-4, -1} B. {1, 4} C. {-3, 8} D. {-8, 3}