Evaluate the expression.
A. 
B. 
C. - 
D. - 
Answer: B
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Find the unit tangent vector T and the principal unit normal vector N. r(t) = (10 + t)i + (4 + ln(sec t))j - 4k, -?/2 < t < ?/2
A. T = (cos t)i + (sin t)j; N = (- sin t)i + (cos t)j B. T = (cos t)i - (sin t)j; N = (-sin t)i - (cos t)j C. T = (-cos t)i - (sin t)j; N = (-cos t)i + (sin t)j D. T = (-cos t)i - (sin t)j; N = (sin t)i - (cos t)j
Solve the problem.Find the work done by a force of 16i (newtons) in moving as object along a line from the origin to the point 
(distance in meters).
A. 32 joules
B. 32
joules
C. 22.63 joules
D. 16
joules
Solve. Write the answer as a mixed number in simplest form.The area of a rectangle is 12 square meters. If its width is 1
meters, find its length.
A. 12 m
B. 7 m
C. 7
m
D. 7
m
Solve the triangle.
?
ft, 
ft, 
ft
?
Apply the rules regarding the use of significant digits after all computations are complete.
?
A. 
B. ?
C. ?
D. ?
E. ?