Graph the pair of parametric equations with the aid of a graphing calculator.x = 3 tan t, y = 4 sec t; -?/2 ? t ? ?/2 
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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The probability of a radar station detecting an enemy plane is 0.55. If 100 stations are in use, what is the expected number of stations that will detect an enemy plane?
A. 100 B. 55 C. 0 D. 98 E. none of these choices
Mathematics
Perform the operation indicated. Simplify.
+ 
A. 
B. 
C. 
D. 
Mathematics
Write the set in set-builder notation.{-1, 0, 1, 2, 3}
A. {x 
is an integer greater than -2}
B. {x 
is an integer greater than -1 and less than 3}
C. {x 
is a natural number greater than -2 and less than 4}
D. {x 
is an integer greater than -2 and less than 4}
Mathematics
Determine convergence or divergence of the series.
A. Diverges B. Converges
Mathematics