Provide an appropriate response.A variable is normally distributed with a mean of 100. Which of the following is the largest?
A. The percentage of observations between 100 and 110
B. The percentage of observations between 95 and 105
C. The percentage of observations between 80 and 90
D. The percentage of observations between 90 and 100
Answer: B
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Find the unit tangent vector T and the principal unit normal vector N. r(t) = 
i + 
j + 4tk
A. T = 
(cos 0.375t)i - 
(sin 0.375t)j + 
k ; N = (-sin 0.375t)i - (cos 0.375t)j
B. T = 
(cos 0.375t)i - 
(sin 0.375t)j + 
k ; N = (-sin 0.375t)i - (cos 0.375t)j
C. T = 
(sin 0.375t)i - 
(cos 0.375t)j ; N = (-sin 0.375t)i - (cos 0.375t)j
D. T = 
(cos 0.375t)i - 
(sin 0.375t)j ; N = (-sin 0.375t)i - (cos 0.375t)j
Find the limit.
A. 
B. ?
C. - 
D. 0
Solve and write interval notation for the solution set. Then graph the solution set.-1 < - 
(3x - 1) ? 
A. 
B. 
C. 
D. 
Write the ratio in lowest terms.50 : 90
A. 
B. 
C. 
D. 