Solve the problem.A company finds that when it spends x million dollars on advertising, its profit P, in thousands of dollars, is given by 
Currently the company spends 18 million dollars on advertising. Use the marginal profit to estimate the change in profit if the company increases its advertising expenditure by one million dollars.
A. -109 thousand dollars
B. 486 thousand dollars
C. 630 thousand dollars
D. 1180 thousand dollars
Answer: A
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A house appreciates by 6% each year. If the house is worth $77,000 today, how much will it be worth 15 years from now?Round your answer to the nearest cent.
A. $184,541.99 B. $184,543.99 C. $184,534.98 D. $184,520.98
Factor completely.-x2 - 2x + 24
A. -1(x - 6)(x + 4) B. (x + 6)(x - 4) C. -1(x - 6)(x - 4) D. -1(x + 6)(x - 4)
Determine whether a linear or quadratic function would be a more appropriate model for the graphed data. If linear, tell whether the slope should be positive or negative. If quadratic, decide whether the coefficient 
of x2 should be positive or negative. CRIME STATISTICS 
Years since 1990
A. Linear; negative B. Quadratic; negative C. Linear; positive D. Quadratic; positive
Identify the vertex of the parabola.f(x) = 
x2 - 
x
A. 
B. 
C. 
D. 