Solve the problem.Sales of CD players in a particular U.S. market are shown in the given table for various years. Let s be the sales of CD players (in thousands) for the year that is t years since 1990. A quadratic model for the sales is 
According to the model, how many CD players were sold in 1997? Is this number an underestimate, an overestimate, or neither? CD Player Sales
A. 185 thousand; neither
B. 275 thousand; overestimate
C. 275 thousand; underestimate
D. 200 thousand; overestimate
Answer: D
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Decide whether the statement is true or false.-11 is a solution of -3x + 9 = 37.
A. True B. False
The table lists data that are exactly linear. (i) Find the slope-intercept form of the line that passes through these data points. (ii) Predict y when x = -1.5 and 4.6. 
A. y = 2.2x + 7; y = 3.70, y = 17.12 B. y = 2.2x - 7; y = -10.3, y = 3.12 C. y = -2.2x - 7; y = -3.7, y = -17.12 D. y = -2.2x + 7; y = 10.3, y = -3.12
Solve the triangle ABC. Round each answer to the nearest tenth when necessary.
A. B ? 28.8° , C ? 26.2°, c ? 27.5 m B. B ? 27.6° , C ? 27.4°, c ? 28.6 m C. B ? 27.6° , C ? 27.4°, c ? 27.5 m D. B ? 28.8° , C ? 26.2°, c ? 25.6 m
Use a product-to-sum identity to rewrite the expression.sin 
cos 
A. 0.5
B. 0.5
C. 0.5
D. 0.5