Solve the problem.Elaine had 65 buttons. Her grandmother donated 5 cards of buttons to the collection. Elaine sorted the buttons into 10 piles, putting 10 buttons in each pile. How many buttons were on each card from Elaine's grandmother?
A. 93 buttons
B. 63 buttons
C. 7 buttons
D. 96 buttons
Answer: C
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Simplify.
+ 
A. 
B. 
C. 
D. 
A city's main well was recently found to be contaminated with trichloroethylene (a cancer-causing chemical) as a result of an abandoned chemical dump leaching chemicals into the water. A proposal submitted to the city council indicated that the cost, measured in millions of dollars, of removing x% of the toxic pollutants is given by 
.
?
Find the vertical asymptote of C(x). Is it possible to remove 99% of the toxic pollutant from the water?
?
A. Vertical asymptote: 
It is possible to remove 99% of the toxic pollutant from the water
B. Vertical asymptote:
It is not possible to remove 99% of the toxic pollutant from the water
C. Vertical asymptote:
It is possible to remove 99% of the toxic pollutant from the water
D. Vertical asymptote:
It is not possible to remove 99% of the toxic pollutant from the water
Without solving, determine the character of the solutions of the equation in the complex number system.x2 + 2x - 3 = 0
A. two unequal real solutions B. two complex solutions that are conjugates of each other C. a repeated real solution
Identify the domain of f. Write your answer in set-builder notation.f(x) = 
A. {x|x ? -6, x ? 0, x ? 6} B. {x|x ? -6, x ? 6} C. {x|x ? 0, x ? 36} D. {x|x ? 0, x ? 6}