Find the required quantity given the wire that lies along the curve r and has density ?.Moment of inertia Iz about the z-axis, where r(t) = (5 cos t)i + (5 sin t)j, 0 ? t ? 
; 
A. Iz = 20
B. Iz = 0
C. Iz = 500
D. Iz = 500
Answer: D
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Which of the following is not a solution to the equation: 9x + y = 81? ?
A. ?(0, 81) B. ?(1, 72) C. ?(9, 0) D. ?(10, 9) E. ?(10, -9)
Find the slope of the line containing the points: 
and 
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?
A.
?4
B.
?-4
C.
?
D.
?
E.
?None of the above.
Use a calculator to find the approximate value of the expression rounded to two decimal places.cos 9°
A. 0.99 B. 0.91 C. -0.91 D. -0.99
Wal-Mart was ranked #1 on Fortune's Most Admired Companies rankings from 2006-2008..
Answer the following statement true (T) or false (F)