Find the expected value of the probability density function to the nearest hundredth.f(x) = 
; [2, 8]
A. 5.00
B. 5.33
C. 6.50
D. 4.50
Answer: A
Mathematics
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Find the limit, if it exists.
A. 1
B. 
C. - 1
D. Does not exist
Mathematics
Solve the problem.How much work does it take to slide a box 33 meters along the ground by pulling it with a 271 N force at an angle of 30° from the horizontal?
A. 
joules
B. 8943
joules
C. 8943 joules
D. 4471.5
joules
Mathematics
Write the first n terms of the given arithmetic sequence (the value of n is indicated in the question).a1 = 2 - 
, a2 = 2, n = 4
A. 2 - 
, 3 - 
,4 - 
, 5 - 
B. 2 - 
, 2, 2 + 
, 2 + 2
C. 0, 0 - 
, 3 - 3
, 4 - 4
D. 0, 2 - 
, 2, 2 + 
Mathematics
Find the algebraic expression that is equal to cos (180° - ?). ?
A. 
B. -sin ?
C. sin ?
D. -cos ?
E. cos ?
Mathematics