Solve the problem.If a tone is formed from the combination of two component frequencies, F1 and F2 , as is done with touch-tone phones, then the tone can be represented as 
if the intensities of the components are equal. For the two component frequencies 
and 
rewrite this expression as a product of trigonometric functions and graph the result in 
-4.0px;" /> by 
A. 2 cos(995?t) cos(995?t)
[0, .005, .001] by [-2, 2, 1]
B. 2 cos(995?t) cos(265?t)
[0, .005, .001] by [-2, 2, 1]
C. 2 cos(1990?t) cos(1990?t)
[0, .005, .001] by [-2, 2, 1]
D. 2 cos(1990?t) cos(530?t)
[0, .005, .001] by [-2, 2, 1]
Answer: D
Mathematics
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Determine an appropriate viewing window for the given function and use it to display its graph.f(x) = 
A. 
B. 
C. 
D. 
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Find the intercepts for the equation.3x + y = 9
A. (3, 0); (0, 9) B. (4, 0); (0, 0) C. (9, 0); (0, 4) D. (0, 0); (0, -3)
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Provide an appropriate response.The revenue R for a product is given by R(x) = 8500x -x2 where x is the number of units sold. Is this function continuous for x = 20?
What will be an ideal response?
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Answer the question.True or False: The graph of the equation 12x - 20y = 12 goes 
A. True B. False
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