2.49 ÷ 15
A. 2.66
B. 0.266
C. 1.66
D. 0.166
Answer: D
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Solve the problem.Find equations for the horizontal and vertical tangent lines to the curve 
A. Horizontal: y = 0 at (0, 0), 
at 
, 
at 
; vertical: 
at 
, 
at 
at 
B. Horizontal: y = 0 at (0, 0), y = 
at 
, 
at 
; vertical: 
at 
, 
at 
at 
C. Horizontal: y = 
at 
, 
at 
; vertical: 
at 
, 
at 
at 
D. Horizontal: 
at 
, 
at 
; vertical: x = 0 at 
at 
, 
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Classify the triangle as acute, obtuse, or right.
A. right B. acute C. obtuse
True or false?The union of the sets (-?, -15] and (-15, ?) is (-?, ?)
A. True B. False
Solve the problem.An experiment is done to determine which of two cleaners cleans better. Twelve lab technicians test each kind of cleaner and give it a rating from 1 to 10. The results are in the two tables below. Which type of cleaner is better? Cleaner X Cleaner Y9 6 7 6 6 7 7 26?2?9?6?2?6?6?26?6?7?2?6?2?9?6
A. Cleaner Y B. Cleaner X