Solve the problem.The owner of a video store has determined that the cost C, in dollars, of operating the store is approximately given by 
where x is the number of videos rented daily. Find the lowest cost to the nearest dollar.
A. $528
B. $831
C. $649
D. $710
Answer: D
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Solve the problem.Six people from different occupations were interviewed for a survey, and their annual salaries were as 
and
What is the median annual salary for the six people?
Fill in the blank(s) with the appropriate word(s).
Solve the system using matrices. If there is no solution or if there are infinitely many solutions and a system's equations are dependent, so state.
A. {(2, -4, 0)} B. {(0, 0, -4)} C. infinitely many solutions; dependent equations D. no solution or ?
Solve the problem.An electronics company kept comparative statistics on two products, A and B. For the years 2005 to 2013, the total number of Product A ever sold (in thousands) is given by the equation 
, where x is the number of years since 2005. For that same period, the total number of Product B ever sold (in thousands) is given by the equation B = -30x + 434, where x is the number of years since 2005. Choose the statement that most accurately describes the solution of the system of equations.
A. At about 1.8 years (to the nearest tenth) from 2005, both products had sold the same amount. B. Product B sold 1.8 times as many as Product A. C. At some point between 2005 and 2013, both products had sold 1800 each. D. When 375,000 of Product A had been sold, Product B had sold 1.8 times as many.
Multiply and simplify any radicals in your answer. Assume that all variables represent positive real numbers.(
- 
)2
A. xy - x
B. 2
- 2
C. xy - 2x
+ x
D. xy + x