Solve the problem.The profit, in dollars, from the sale of x compact disc players is 
Find the marginal profit when x = 10 .
A. $690
B. $230
C. $239
D. $699
Answer: B
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A seemingly simple argument is given. Identify at least two hidden assumptions.The campfire should be extinguished before we go fishing because the park ranger can cite us for illegal activities.
What will be an ideal response?
List the intercepts of the graph.Tell whether the graph is symmetric with respect to the x-axis, y-axis, origin, or none of these. 
A. intercepts: (-1, 0), (0, 0), (1, 0) symmetric with respect to x-axis B. intercepts: (-1, 0), (0, 0), (1, 0) symmetric with respect to y-axis C. intercepts: (-1, 0), (0, 0), (1, 0) symmetric with respect to x-axis, y-axis, and origin D. intercepts: (-1, 0), (0, 0), (1, 0) symmetric with respect to origin
Write the repeating decimal using the bar over the repetend.0.438438438 . . .
A. 0.
B. 0.
8
C. 0.43
D. 0.4
Multiply.(x + 7)(x - 7)
A. x2 - 14x - 49 B. x2 - 14 C. x2 + 14x - 49 D. x2 - 49