Solve the problem.Because of material shortages, it is increasingly expensive to produce 6.0L diesel engines. In fact, the profit in millions of dollars from producing x hundred thousand engines is approximated by 
where 
Find the inflection point of this function to determine the point of diminishing returns.
A. (6.00, 408.00)
B. (4.50, 498.00)
C. (6.00, 498.00)
D. (6.00, 90.00)
Answer: C
Mathematics
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Solve using the elimination method.- x + 4y = -4-3x - 4y = 20
A. (-3, -3) B. (-4, -2) C. No solution D. (2, -4)
Mathematics
Solve the problem.A surveyor is measuring the distance across a small lake. He has set up his transit on one side of the lake 120 feet from a piling that is directly across from a pier on the other side of the lake. From his transit, the angle between the piling and the pier is 40°. What is the distance between the piling and the pier to the nearest foot?
A. 143 ft B. 77 ft C. 101 ft D. 92 ft
Mathematics
Multiply and simplify.
? 
A. 
B. 
C. 
D. 
Mathematics
Solve the quadratic equation by completing the square.5x2 - 25x + 57 = 0
A. 
B. 
C. no real solution
D. 
Mathematics