Use the zero-product property to find all complex solutions of the equation.x4 + 13x2 - 48 = 0
A. 
B. 
C. 
D. 
Answer: D
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Solve the problem.A heavy-duty shock absorber is compressed 4 cm from its equilibrium position by a mass of 300 kg. How much work is required to compress the shock absorber 7 cm from its equilibrium position? (A mass of 300 kg exerts a force (in N) of 300g, where g ? 9.8 m/s2.)
A. 18.375 J B. 1,837.5 J C. 180.075 J D. 18,007.5 J
Convert the equation given in rectangular form into polar form.y = 9
A. r = 
B. r = 
C. r = 9
D. sin ? = 9
Write as a fraction in simplest form.43.
%
A. 
B. 
C. 
D. 
Solve the problem.A sushi restaurant charges $8.95 for its lunch buffet and $12.95 for its dinner buffet. In order for the restaurant to turn a profit, its buffets must generate daily revenue of at least $2190. Write an inequality that describes this requirement. Let x represent the number of lunch buffet customers and y represent the number of dinner buffet customers.
A. 8.95x + 12.95y ? 2190 B. 8.95x + 12.95y ? 2190 C. 8.95x + 12.95y = 2190 D. 8.95x + 12.95y ? 2190