Determine if the graph represents y as a function of x.
A. Not a function
B. Function
Answer: B
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Solve the problem.A firm estimates that it will sell N units of a product after spending x dollars on advertising, where 
and x is in thousands of dollars. By sketching the function determine how much the company should spend in order to maximize sales, and find the maximum sales.
A. The company should spend $250,000. Maximum sales are 187,488 units B. The company should spend $500,000. Maximum sales are 187,488 units C. The company should spend $500,000. Maximum sales are 62,488 units D. The company should spend $250,000. Maximum sales are 62,488 units
Perform the indicated operation.
- 
A. 
B. 
C. - 
D. 
Determine whether the triangles are congruent. If they are congruent, state why.
A. not congruent B. congruent; ASA C. congruent; SSS D. congruent; AAS
Express the number in scientific notation.5,300,000
A. 5.3 × 10-5 B. 5.3 × 10-6 C. 5.3 × 106 D. 5.3 × 105