Find the mass of the wire that lies along the curve r and has density ?.r(t) = i + 2tj, 0 ? t ? 1; ? = 3t

A.  units
B.  units
C.  units
D.  units

Answer: D

Mathematics

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A. {5, 0}
B. {0, -5}
C. {±}
D.

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A. 1, -3, 2, -2 B. 1, -3, 1/2, -1/2 C. -1, -3, 1/2, -1/2 D. -1, 3, -1/2, 1/2

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Provide an appropriate response.Given a geometric sequence such that a1 = 2 and a4 = -128, find a5.

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