Determine whether the following is a probability model.
A. Yes
B. No
Answer: A
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Multiply and write answer in lowest terms.5 × 5
A. 25
B. 25
C. 29
D. 28
For the given equation, first identify the phase shift and then sketch one complete cycle of the graph. Graph 
on the same coordinate system.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Use trigonometric identities to solve each equation in the interval [0, 2?] tan2 x = - 
sec x
A. 
, 
B. 
, 
C. 
, 
, 
, 
D. 
, 
A corporation has a division that produces two models of fireplace grates, model A and model B. To produce each model A grate requires 3 lb of cast iron and 6 min of labor. To produce each model B grate requires 4 lb of cast iron and 3 min of labor. The profit for each model A grate is $2.50, and the profit for each model B grate is $1.50. If 1,000 lb of cast iron and 20 labor-hours are available for the production of fireplace grates per day, how many grates of each model should the division produce in order to help maximize the division's profits?
a. 120 model A, 160 model B; optimal profit $540 b. 200 model A, 160 model B; optimal profit $950 c. 0 model A, 250 model B; optimal profit $375 d. 200 model A, 0 model B; optimal profit $500