Solve the problem.The perimeter of a rectangle is 52 m. If the width were doubled and the length were increased by 24 m, the perimeter would be 114 m. What are the length and width of the rectangle?
A. width 7 m, length 19 m
B. width 19 m, length 7 m
C. width 8 m, length 13 m
D. width 13 m, length 13 m
Answer: A
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Determine whether the set is well defined or not.{x : x is stock on the AmEx today}
A. Not well defined B. Well defined
Solve the problem.A tank initially contains 100 gal of brine in which 60 lb of salt are dissolved. A brine containing 4 lb/gal of salt runs into the tank at the rate of 8 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 = 32
B. 
+ 
y = 20
C. 
= 32 - 
y
D. 
+ 
y = 32
Determine the viewing window used.
A. 
B. 
C. 
D. 
Find the length of the curve.x = 2t, y = 
t 3/2, 0 ? t ? 21
A. 39
B. 82
C. 78
D. 