Find the standard deviation.49, 19, 34, 26, 10, 47, 72
A. 378.8
B. 34
C. 19.5
D. 36.7
Answer: C
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Consider only the discriminant, b2 - 4ac, to determine whether one real-number solution, two different real-number solutions, or two different imaginary-number solutions exist.x2 + 4x + 4 = 0
A. Two different real-number solutions B. Two different imaginary-number solutions C. One real solution
Perform the indicated operation or operations. Simplify, if possible.
+ 
A. 
B. m - 2
C. m - 5
D. m + 2
Write down all the subsets of the given set.{1, 4, 8, 12}
A. {1}, {4}, {8}, {12}, {1, 4}, {1, 8}, {1, 12}, {4, 8}, {4, 12}, {8, 12}, {1, 4, 8}, {1, 4, 12}, {1, 8, 12}, {4, 8, 12}, {1, 4, 8, 12} B. {1}, {4}, {8}, {12}, {1, 4}, {1, 8}, {1, 12}, {4, 8}, {4, 12}, {8, 12}, {1, 4, 8}, {1, 4, 12}, {1, 8, 12}, {4, 8, 12}, ? C. {1}, {4}, {8}, {12}, {1, 4}, {1, 8}, {1, 12}, {4, 8}, {4, 12}, {8, 12}, {1, 4, 8}, {1, 4, 12}, {1, 8, 12}, {4, 8, 12}, {1, 4, 8, 12}, ? D. {1}, {4}, {8}, {12}, {1, 4}, {1, 8}, {1, 12}, {4, 8}, {4, 12}, {1, 4, 8}, {1, 4, 12}, {1, 8, 12}, {4, 8, 12}, {1, 4, 8, 12}, ?
?Find 
, if 
.
?
A. ?
B. ?
C. ?
D. ?
E. ?