Determine the amplitude or period as requested.Period of y = 
cos 
A. 
B. 
C. 
D. 
Answer: D
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Use the graph to answer the question.
Mike decides to buy shares of companies X and Y, which were initially selling for the same price. The changes in each stock's value over 90 days are shown in the graph above. When did the two stocks have the same value, other than when he bought them?
A. day 90 B. day 80 C. day 85 D. day 50
Find the absolute extreme values of the function on the interval.f(x) = tan x, - 
? x ? 
A. absolute maximum is 
at x = 
and - 
; no minimum value
B. absolute maximum is 
at x = 
; absolute minimum is -1 at x = - 
C. absolute maximum is -1 at x = 
; absolute minimum is 
at x = - 
D. absolute maximum is 
at x = 
; absolute minimum is -1 at x = - 
Find y '.y = 
A. 2x - 
B. 2x + 
C. 2x + 
D. 2x + 
The total daily profit (in dollars) realized by Weston Publishing in publishing and selling its dictionaries is given by the profit function
?
?
where x stands for the number of deluxe editions and y denotes the number of standard editions sold daily. Weston's management decides that publication of these dictionaries should be restricted to a total of exactly 400 copies/day. How many deluxe copies and how many standard copies should be published each day to maximize Weston's daily profit?
?
Find the number of deluxe copies.
?
Find the number of standard copies.
What will be an ideal response?