Solve and check.7 + y = 18
A. y = 11
B. y = 126
C. y = 9
D. y = 25
Answer: A
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Solve the problem.A tank initially contains 100 gal of brine in which 40 lb of salt are dissolved. A brine containing 
of salt runs into the tank at the rate of 4 gal/min. The mixture is kept uniform by stirring and flows out of the tank at the rate of 3 gal/min. Find the solution to the differential equation that models the mixing process.
A. y = 4(50 + t) - 
B. y = 4(50 + t) - 
C. y = 2(100 + t) - 
D. y = 2(100 + t) - 
Solve the problem.Computer Specialists is planning a group vacation to one of the following locations: Alaska (A), Florida (F), San Antonio (S), or Hawaii (H). The employees rank the four possible sites according to the following preference schedule.
Which choice wins using the method of pairwise comparisons?
A. Alaska & Hawaii (tie) B. Alaska C. Florida & Hawaii (tie) D. Alaska & Florida (tie)
Solve the problem.How many months are there in 21 years?
A. 43 months B. 33 months C. 262 months D. 252 months
Use logarithmic differentiation to find the derivative of y.y = 
A. 
B. 
C. 
D. 
- tan x - 