Find the angle between vectors v and w. Round the answer to the nearest tenth of a degree.v = 8i - 4j,  w = 2i - 8j

A. 29°
B. 107.5°
C. 120°
D. 49.4°


Answer: D

Mathematics

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Find the volume by double integration.The volume under the surface  and above the triangle enclosed by the lines  , and  

A.
B.
C. 162
D.

Mathematics

Simplify. Write the answer using only positive exponents. Leave the answer in exponential notation.(3x4)4 

A. 81x4 B. 81x16 C. 3x16 D. 81x8

Mathematics

Find the domain of the composite function f ? g.f(x) = ; g(x) = 

A.
B. {x | x ? 2}
C. all real numbers
D. {x| x ? 2}

Mathematics

Write the first four terms of the recursive sequence.a1 = 5, an = 1 -   for n ? 2

A. 5, - 
B. 5, , - , -5
C. 5, , -3
D. 5, , - , 5

Mathematics