Solve the problem.The chart represents the amount of fuel consumed by a machine used in manufacturing. The machine is turned on at the beginning of the day, takes a certain amount of time to reach its full power (the point at which it uses the most fuel per hour), runs for a certain number of hours, and is shut off at the end of the work day. The fuel usage per hour of the machine is represented by a periodic function. When does the machine first reach its full power?
A. After 2 hours
B. After 14 hours
C. After 4 hours
D. After 7 hours
Answer: A
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Use the graph of the function f(x) to locate the local extrema and identify the intervals where the function is concave up and concave down.
A. Local minimum at x = 1; local maximum at x =-1; concave down on (0, ?); concave up on (-?, 0) B. Local maximum at x = 1; local minimum at x =-1; concave up on (0, ?); concave down on (-?, 0) C. Local maximum at x = 1; local minimum at x =-1; concave up on (-?, ?) D. Local minimum at x = 1; local maximum at x =-1; concave up on (0, ?); concave down on (-?, 0)
Perform the operation and give the answer in the same numeration system. Write the answer as simply as possible.Add 
and 
A. 
B. 
C. 
D. 
Provide an appropriate response.In a simplex table that gives an optimum solution, a zero indicator for a nonbasic variable suggests
A. the problem has an unbounded solution. B. there is a possibility for multiple optimum solutions. C. a degenerate BFS will occur.
Add. Write the answer in lowest terms.
+ 
A. 
B. 
C. 
D. 