Solve the inequality and graph the solution set. Write the solution set in interval notation.| x | > 6
A. (6, ?)
B. (-?, -6) ? (6, ?)
C. (-6, 6)
D. (-?, -6)
Answer: B
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Solve.A rectangular box with volume 468 cubic feet is built with a square base and top. The cost is $1.50 per square foot for the top and the bottom and $2.00 per square foot for the sides. Let x represent the length of a side of the base in feet. Express the cost of the box as a function of x and then graph this function. From the graph find the value of x, to the nearest hundredth of a foot, which will minimize the cost of the box.
A. 8.55 feet B. 8.63 feet C. 8.44 feet D. 7.92 feet
Identify f as being linear, quadratic, or neither. If f is quadratic, identify the leading coefficient.f(x) = 
A. Linear B. Quadratic; 2 C. Quadratic; -9 D. Neither
Simplify the quotient. Assume all variables represent positive real numbers.
A. 4x2
B. 4x2
C. 4
D. 4x4
Solve the problem.An application of Kirchoff's Rules to the circuit shown results in the following system of equations:
Find the currents I1, I2, and I3.
A. I1 = 2.5, I2 = 1.5, and I3 = 1 B. I1 = 4.5, I2 = 3.5, and I3 = 1 C. I1 = 5.5, I2 = 4.5, and I3 = 1 D. I1 = 3.5, I2 = 2.5, and I3 = 1