Suppose that, for a certain exam, a teacher grades on a curve. It is known that the mean is 70 and the standard deviation is 8. There are 50 students in the class. What score would be necessary to obtain an A at least?
?
?
__________ or above
Fill in the blank(s) with the appropriate word(s).
86
Mathematics
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Shade the solution set in the xy-plane.x + y ? 6
A. 
B. 
C. 
D. 
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Multiply and simplify. Assume variables do not cause any denominators to equal 0.- 
? 
A. - 
B. - 
C. - 
D. - 
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Solve the problem.Find -x when x is 22
A. -22
B. 0
C. 22
D. 
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Convert to scientific notation.0.0000000838011
A. 8.38011 × 108 B. 8.38011 × 10-7 C. 8.38011 × 10-9 D. 8.38011 × 10-8
Mathematics