Use an identity to find the exact value of the expression.tan
A. 2 + 
B. 
- 2
C. 2 - 
D. -2 - 
Answer: B
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Graph the function. State the domain and range.y = - x2 + 4x - 4
A. 
Domain: ? Range: y ? 0
B. 
Domain: ? Range: ?
C. 
Domain: ? Range: ?
D. 
Domain: ? Range: y ? 0
Determine whether the following is always true or not always true. Given reasons for your answers.u × 0 = 0
What will be an ideal response?
Multiply the expressions.(8x + 7)(8x - 7)
A. 64x2 - 49 B. 64x2 - 112x - 49 C. 64x2 + 112x - 49 D. x2 - 49
Solve the problem.The sales of a mature product (one which has passed its peak) will decline according to the function 
where t is time in years since the peak sales. Find the sales of a product 23 years after its peak sales if 
and 
Round to the nearest whole number.
A. 284 sales B. 35,945,503 sales C. 142 sales D. 114,407 sales