Graph the function. Show at least one period.y = 5 cos
A. 
B. 
C. 
D. 
Answer: A
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Express the trigonometric function in terms of the same function of a positive acute angle.csc 166°
A. csc 59° B. -csc 59° C. -csc 14° D. csc 14°
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.
Choose the graph that models the situation best.The number of computer floppy disks purchased during the last 5 years.
A. 
B. 
C. 
D. 
Solve the problem.A certain mathematics test consists of 20 questions. Goldie decides to answer the questions without reading them. In how many ways can Goldie fill in the answer sheet if the possible answers are true and false?
A. 1,048,576 B. 40 C. 190 D. 400