Find the indicated vector.Let u = 
. Find -3u.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the problem. Round to the nearest whole unit.The top and base of a window are respectively 11 ft and 3 ft above the level of an observer's eyes. At what distance from the wall must the observer stand in order to make the angle subtended by the window equal to the angle of elevation of its base?
A. 6 ft B. 8 ft C. 10 ft D. 4 ft
Mathematics
Express the number as the ratio of two integers.1.363636 . . .
A. 
B. 
C. 
D. 
Mathematics
Compute the difference. Express answer in simplest form.
- 
A. 
B. 
C. 
D. 
Mathematics
Find the domain and range.f(x) = 
A. D = (-?, -6) ? (-6, ?) , R = [0, ?)
B. D = (-?, 6) ? (6, ?) , R = (-?, ?)
C. D = (-?, 6) ? (6, ?) , R = 
D. D = (-?, -6) ? (-6, ?) , R = 
Mathematics