Solve the problem.Sales of new digital cameras were researched in a particular U.S. market for a range of years. Let s be the sales of new digital cameras (in thousands) for the year that is t years since 1995. A quadratic model for the sales is 
What year is represented by the vertex of this model? What is the best interpretation of the model for points to the left of the vertex?
A. 1998; Sales are greater for earlier years.
B. 1999; The model breaks down.
C. 1999; Sales are greater for earlier years.
D. 1998; The model breaks down.
Answer: D
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A. 86 B. 117 C. 126 D. 105
Answer the question.Explain how to find the effective interest rate for a simple discount note.
What will be an ideal response?
Suppose you are given 12 coins, one of which is counterfeit and weighs a little more or less than the real coins. Using a two-pan balance scale, what is the minimum number of weighings necessary to find the counterfeit coin? ?
A. 7 weighings B. 3 weighings C. 1 weighings D. 4 weighings E. 6 weighings
Find the value(s) of the function, subject to the system of inequalities.Find the maximum and minimum of 
subject to:0 ? x ? 5, 0 ? y ? 8, 4x + 5y ? 30, and 
A. -132, 0 B. 100, -132 C. 100, 0 D. -85, -132