Provide an appropriate response.Is this a square matrix? Why or why not? 
What will be an ideal response?
No. The number of rows (3) is not the same as the number of columns (4).
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Evaluate the improper integral or state that it diverges.
A. 18?
B. 18
2
C. 36 ln 
D. 18?
Solve the equation.-7b + 6 + 5b = -3b + 11
A. 11 B. -6 C. -11 D. 5
Identify the figure.
DN
A. line segment, 
or 
B. ray, 
C. line, 
or 
D. ray, 
Tank A contains 200 lbs of salt dissolved in 1000 gal of water. Tank B contains 300 lbs of salt dissolved in 1000 gal of water. The mixture from tank A is pumped to tank B at the rate of 750 gal per hr, while the mixture from tank B is pumped to tank A at the same rate. Assume that the mixture in each tank is uniform by stirring. Let A(t ) and B(t ) be the amount of salt in tanks A and B after t hours, respectively.
(a) Draw a two-compartment model for A(t ) and B(t ). (b) Use the initial conditions A(0) = 200 and B(0) = 300 to solve for A and B. (c) What are the equilibrium values of A and B? Let x and y represent the populations (in thousands) of two species that share a habitat. For each system of equations, find and assess the stability of the equilibrium points. Remember that, for real populations, both x0 and y0 must be nonnegative for ( x0, y0) to be an equilibrium point.