Solve the initial value problem.u''(x) = 12e2x - 12e-2x, u(0) = 8, u'(0) = 14
A. u = 3e2x + 3e-2x + 2x + 8
B. u = 3e2x - 3e-2x + 2x + 8
C. u = 3e2x + 3e-2x + 2x - 8
D. u = 3e2x - 3e-2x - 2x - 8
Answer: B
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Solve the problem. Round your answer, if appropriate.A man 6 ft tall walks at a rate of 4 ft/sec away from a lamppost that is 16 ft high. At what rate is the length of his shadow changing when he is 50 ft away from the lamppost? (Do not round your answer)
A. 
ft/sec
B. 
ft/sec
C. 
ft/sec
D. 
ft/sec
Find the unknown value in the percent proportion 
Round to the nearest tenth, if necessary.whole = 110, percent = 20
A. part = 11 B. part = 18.2 C. part = 22 D. part = 55
Solve the problem.In a certain apportionment problem, State X has a standard quota of 48.9. The final apportionment to State X is 47 seats. This is called
A. an upper-quota violation. B. a lower-quota violation. C. the population paradox. D. the Alabama paradox. E. none of these
Find the domain of the rational function.h(x) = 
A. {x|x ? 0, -9, 2} B. {x|x ? -2, 9} C. {x|x ? 0, -2, 9, 140} D. {x|x ? 0, -2, 9}