Find the length of the indicated portion of the trajectory.r(t) = (etcos t)i + (etsin t)j + 5etk, -ln 2 ? t ? 0

A.
B.
C.
D.


Answer: A

Mathematics

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Find the extreme values of the function subject to the given constraint.  

A. Maximum: none; minimum:    at  
B. Maximum: none; minimum:    at  
C. Maximum: none; minimum:    at  
D. Maximum: none; minimum:    at  

Mathematics

a = 6, b = 4, and c = 5. Using the Law of Cosines, solve for angle A.

a. 55.77ø b. 82.82ø c. 53.13ø d. 41.40ø e. 75.30ø

Mathematics

Solve.A cyclist bikes at a constant speed for 20 miles. He then returns home at the same speed but takes a different route. His return trip takes one hour longer and is 25 miles. Find his speed.

A. 6 mph B. 7 mph C. 5 mph D. 4 mph

Mathematics

Find the logarithm.log8 

A. -1 B. 0 C. 8 D. 1

Mathematics