Solve.If the cost, C(x), for manufacturing x units of a certain product is given by 
, find the number of units manufactured at a cost of $15,400.
A. 50 units
B. 100 units
C. 130 units
D. 80 units
Answer: B
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First, use front-end rounding to round each number and estimate the answer. Then, find the exact answer.Mr. Buttimer took a plane trip for a total of 5.5 hours. He watched an in-flight movie for 1.84 hours. From the airport, he took a cab ride for 0.78 hour to the train station. Next, he took the train home for 1.98 hours. What was the total time spent traveling?
A. Estimate: 12 hours; exact: 10.1 hours B. Estimate: 11 hours; exact: 8.26 hours C. Estimate: 9 hours; exact: 8.26 hours D. Estimate: 11 hours; exact: 10.1 hours
Solve the inequality and graph the solution set.
< 11
A. (-6, 0)
B. (-?, -6) ? (6, ?)
C. (-?, -6) ? (0, ?)
D. (-6, 6)
Describe the transformation required to obtain the graph of the given function from the basic trigonometric graph.y = -cot x
A. Reflection across the x-axis B. Vertical translation down 1 unit C. Reflection across the x-axis and the y-axis D. Vertical translation up 1 unit
Solve the quadratic equation by the method of your choice.2x2 - 
x - 1 = 0
A. 
B. 
C. 
D. 