Find the exact value of the expression or state that it does not exist.sec
A. 
B. 0
C. 2
D. 1
Answer: C
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Solve the problem.A piece of land is shaped like a right triangle. Two people start at the right angle of the triangle at the same time, and walk at the same speed along different legs of the triangle. If the area formed by the positions of the two people and their starting point (the right angle) is changing at 
then how fast are the people moving when they are 
from the right angle? (Round your answer to two decimal places.)
A. 3.00 m/s B. 0.50 m/s C. 1.00 m/s D. 2.00 m/s
Solve the problem.Find the volume that remains after a hole of radius 1 is bored through the center of a solid cylinder of radius 4 and height 8.
A. 128? B. 8? C. 60? D. 120?
Solve the problem.An employment agency required 20 secretarial candidates to type the same manuscript. The number of errors found in each manuscript is summarized in the histogram. Find the empirical probability that a candidate has less than four errors in the typed manuscript.
A. 
B. 
C. 
D. 
Find T, N, and B for the given space curve.r(t) = 
i + 
j + 3tk
A. T = 
(cos 1.333t)i - 
(sin 1.333t)j + 
k ; N = (-sin 1.333t)i - (cos 1.333t)j ; B = 
(cos 1.333t)i - 
(sin 1.333t)j - 
k
B. T = 
(cos 1.333t)i - 
(sin 1.333t)j + 
k ; N = (-sin 1.333t)i - (cos 1.333t)j ; B = - 
k
C. T = 
(sin 1.333t)i - 
(cos 1.333t)j ; N = (-sin 1.333t)i - (cos 1.333t)j ; B = 
(cos 1.333t)i - 
(sin 1.333t)j - 
k
D. T = 
(cos 1.333t)i - 
(sin 1.333t)j ; N = (-sin 1.333t)i - (cos 1.333t)j ; B = 
(cos 1.333t)i - 
(sin 1.333t)j - 
k