In the Lotka-Volterra predator-prey model 
, where x(t) is the predator population and ?y(t) is the prey population, the coefficient c represents which of the following:
Select the correct answer.
?
A. the predator die-off rate
B. the prey growth rate
C. the increase in the predator population due to interactions with the prey
D. the decrease in the prey population due to interactions with the predator
E. none of the above
Answer: D
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Find the product.
? 
A. 
B. 
C. - 
D. - 
The graph of a function f is given. Use the graph to answer the question.How often does the line y = 4 intersect the graph?
A. once B. twice C. three times D. does not intersect
A triangle with vertices at (x1, y1), (x2, y2), and (x3, y3) has area equal to the absolute value of D, where 
. Use this information to solve the problem.Use D to determine whether the three points are collinear. (-2, -9), (4, 9), (2, 5)
A. The points are collinear. B. The points are not collinear.
Solve the problem.Carney and Dobler sell auto and hazard insurance. Their sales, in dollars, for the months of July and August are given in the following matrices. Auto HazardJuly: 
August: 
Find a matrix that gives the increase (decrease) in sales by each salesman for each type of insurance from July to August.
A. 
B. 
C. 
D. 