For an election with four candidates (A, B, C, and D) we have the following preference schedule:
The ranking of the candidates using the Borda count method is
A. first: A; second: D; third: C; fourth: B.
B. first: D; second: A; third: C; fourth: B.
C. first: D; second: C; third: A; fourth: B.
D. first: A; second: C; third: D; fourth: B.
E. none of these
Answer: A
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Solve the problem.A tank initially contains 140 gal of brine in which 60 lb of salt are dissolved. A brine containing 5 lb/gal of salt runs into the tank at the rate of 7 gal/min. The mixture is kept uniform by stirring and flows out of the tank at the rate of 5 gal/min. Write, in standard form, the differential equation that models the mixing process.
A. 
+ 
y = 35
B. 
+ 
y = 25
C. 
+ 
y = 35
D. 
= 35 - 
y
Find the average value of 
over the given region.
over the cube in the first octant bounded by the coordinate planes and the planes 
, 
, 
A. 36 B. 72 C. 27 D. 18
Solve the problem.The map shows the states New Mexico, Oklahoma, Texas, Arkansas, and Louisiana. Find a route that starts in Texas and crosses each common state border exactly one time.
A. TX ? LA ? AR ? TX ? OK ? AR ? TX ? NM ? OK B. TX ? LA ? AR ? TX ? OK ? NM ? TX C. TX ? NM ? OK ? AR ? LA ? TX D. No such route exists.
Subtract and check the difference.
A. 107 B. 87 C. 109 D. 85