Find the following. Assume that letters can represent any real number.
A. x
B. x2
C. Not a real number
D. 
Answer: D
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Solve the given third- or fourth-order differential equation.D4y - 2 D3y - 9 D2y + 18 Dy = 0
A. y = c1 + c2e3x + c3e-3x+ c4e2x B. y = c1 + c2e3x + c3e-3x + c4e-2x C. y = c1e3x + c2e-3x+ c3e-2x D. y = c1e3x + c2e-3x + c3e-2x
Solve the problem.If an object is dropped from a tower, then the velocity, V (in feet per second), of the object after t seconds can be obtained by multiplying t by 32 and adding 10 to the result. Find an equation relating the velocity, V, to the number of seconds, t. Use this equation to find the velocity of the object at time 
A. 68.9 ft/sec B. 66.9 ft/sec C. 67.6 ft/sec D. 65.6 ft/sec
Convert the given unit of measure to the measure shown.37.84 meters to kilometers
A. 0.3784 kilometer B. 3784 kilometers C. 0.03784 kilometer D. 37,840 kilometers
Solve the problem.A local office supply store has an annual demand for 10,000 cases of photocopier paper per year. It costs 
per year to store a case of photocopier paper, and it costs 
to place an order. Find the optimum number of cases of photocopier paper per order.
A. 1183 B. 1,400,000 C. 374 D. 837