Find all real numbers in [0, 2?] that satisfy the equation.cos 2x = 
A. 
B. 
, 
, 
, 
C. 
, 
D. 
Answer: B
Mathematics
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Solve the problem.A water trough has a semicircular cross section with a radius of 0.25 m and a length of 5 m (see figure). How much work is required to pump water out of the trough when it is full? Round to two decimal places when appropriate.
A. 12,250 J B. 255.21 J C. 61,211.72? J D. 510.42 J
Mathematics
Find the limit of the sequence or determine that the limit does not exist.an = 
A. 0
B. does not exist
C. 
D. 1
Mathematics
For the given functions f and g, find the requested composite function value.f(x) = 6x + 7, g(x) = 
;
Find (g ? f)(3).
A. - 
B. - 
C. 3
D. 
Mathematics
Find the range of the set of numbers.5, 0, 14, 16, 13
A. 13 B. 29 C. 10 D. 16
Mathematics