Perform the operation indicated.
÷ 
A. 21
B. 
C. 
D. 
Answer: A
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Simplify the complex fraction.
A. 30y(y + 8)
B. 
C. 
D. 
Solve the system of equations by Gauss-Jordan elimination.
A. {(0, -4, 0)} B. {(0, -4, 4)} C. {(0, 0, -4)} D. ?
Sketch the graph of the polar equation.r = 6 sin ?
A. 
B. 
C. 
D. 
Solve the problem.The supply S and demand D for a certain commodity satisfy the equations S = 25 - 2p(t) + 4p'(t) and 
If p(0) = 55, find the equilibrium price p at time t and the long-range equilibrium price.
A. The equilibrium price p for time t is p(t) = 10e-3t + 20. The long-range equilibrium price 
is 20.
B. The equilibrium price p for time t is p(t) = 15e-2t + 40. The long-range equilibrium price 
is 40.
C. The equilibrium price p for time t is p(t) = 15e-2t + 40. The long-range equilibrium price 
is 15.
D. The equilibrium price p for time t is p(t) = 10e-3t + 20. The long-range equilibrium price 
is 10.