Find the value of the indicated trigonometric function of the angle ? in the figure. Give an exact answer with a rational denominator.
Find tan ?.
A. tan ? = 
B. tan ? = 
C. tan ? = 
D. tan ? = 
Answer: D
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Find an equation of the tangent line at the indicated point on the graph of the function.y = f(x) = 2
- x + 9, (x, y) = (4, 9)
A. y = - 
x + 11
B. y = - 
x + 9
C. y = 9
D. y = 
x - 11
Solve the problem.For the study described below, identify the sample statistic.A manufacturer of light bulbs wants to determine the average lifetime of its 75-watt light bulbs. Among 120 randomly selected 75-watt light bulbs, the average lifetime was 1007 hours.
A. The 120 randomly selected 75-watt light bulbs B. 120, the number of light bulbs in the sample C. The average lifetime of all 75-watt light bulbs manufactured by the company D. The average lifetime of the 120 randomly selected 75-watt light bulbs
Simplify.520 ÷ 13 - (5 + 3)
A. 38 B. 104 C. 35 D. 32
Solve the equation.65n2 + 45n = 0
A. 0
B. - 
, 0
C. 
, 0
D. 
, - 