A manufacturer of lighting fixtures has daily production costs of 
where C is the total cost (in dollars) and x is the number of units produced. How many fixtures should be produced each day to yield a minimum cost?
(Round your answer to two decimal places.)
?
A. 160
B. 106.67
C. 320
D. 400
E. 800?
Answer: A
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Answer the question.How can the graph of f(x) = -7x3 + 8 be obtained from the graph of 
A. Stretch it horizontally by a factor of -7. Reflect it across the x-axis. Shift it vertically 8 units downward. B. Stretch it horizontally by a factor of 8. Reflect it across the x-axis. Shift it vertically 7 units upward. C. Stretch it vertically by a factor of 7. Reflect it across the y-axis. Shift it vertically 8 units upward. D. Stretch it vertically by a factor of 7. Reflect it across the x-axis. Shift it vertically 8 units upward.
Find the sum of the sequence.
A. 27 B. 38 C. 56 D. 60
Factor completely.4x2 + 18x - 10
A. (4x - 2)(x + 5) B. (2x - 1)(2x + 10) C. 2(2x - 1)(x + 5) D. 2(2x + 1)(x - 5)
Determine whether the equation defines y as a function of x. y = 
A. function B. not a function