Evaluate the sum.

A. 20
B. 30
C. 50
D. 55


Answer: B

Mathematics

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Find the length of the curve.The spiral r = 5?2, 0 ? ? ? 2

A. 720
B. 80?5
C. ((?2 + 1)3/2 - 1)
D.

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Solve the problem.Each year, 492 people move from Babbittown. How many people have moved from the town in 5 years?

A. 2360 people B. 2470 people C. 2952 people D. 2460 people

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Find the domain of the function.h(x) = 

A. (-?, 2) ? (2, ?) B. (-?, 0) ? (0, ?) C. (-?, ?) D. (-?, -6) ? (-6, 0) ? (0, 6) ? (6, ?)

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Find the unit vector in the direction of the given vector. Write your answer in the indicated form.Let u = . Find the unit vector in the direction of u, and write your answer as a linear combination of the standard unit vectors i and j.

A. i + j 
B. i + j 
C. i + j
D. i + j

Mathematics