If ? is an angle in the indicated quadrant, determine whether the given function is positive or negative.III, cos ?
A. Positive
B. Negative
Answer: B
Mathematics
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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) - 
Mathematics
Solve the problem.Find the distance from the point 
to the plane 
A. 
B. 
C. 
D. 
Mathematics
Graph the following function from 
to 
.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics
Graph the function.y = 
tan x
A. 
B. 
C. 
D. 
Mathematics