Provide an appropriate response.What proportion of the following sample of ten measurements lies within 2 standard deviations of the mean? 
A. 80%
B. 70%
C. 100%
D. 90%
Answer: D
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How many permutations does a combination lock have if each combination has three numbers, no two numbers of any combination are equal, and the lock has 25 numbers?
A. 13,806 B. 13,757 C. 13,797 D. 13,800
At the given point, find the line that is normal to the curve at the given point.2x2y - ? cos y = 3?, normal at (1, ?)
A. y = 
x - 
+ ?
B. y = -2?x + 3?
C. y = 
x - 
+ ?
D. y = - 
x + 
+ ?
Make the following length or weight conversion between the U.S. and the metric system.5.3 meters to inches (Round to the nearest tenth.)
A. 13.5 in. B. 208.7 in. C. 190.8 in. D. 5.8 in.
Graph the system of inequalities and the points of intersection of the graphs. Label the points of intersection with their coordinates.y ? -x2x + y ? -2
A. 
B. 
C. 
D. 