Find the elasticity.q = D(x) = 
A. E(x) = 
B. E(x) = 
C. E(x) = 1
D. E(x) = 
Answer: C
Mathematics
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Solve the problem.A ball is dropped from a height of 21 m and always rebounds 
of the height of the previous drop. How far does it travel (up and down) before coming to rest?
A. 105 m B. 42 m C. 126 m D. 63 m
Mathematics
Find the derivative of y with respect to x, t, or ?, as appropriate.y = 
A. 
B. 
C. 
D. 
Mathematics
Find the exact value by using a half-angle identity.cos 165°
A. - 
B. 
C. 
D. - 
Mathematics
Solve the problem.When a single card is drawn from an ordinary 52-card deck, find the odds in favor of getting a red 2 or a black 3.
A. 2 : 25 B. 1 : 11 C. 1 : 12 D. 1 : 25
Mathematics