Find the standard deviation for each data set. Round to one more place than the data.2, 6, 15, 9, 11, 22, 1, 4, 8, 19

A. 7.1
B. 6.3
C. 2.1
D. 6.8


Answer: A

Mathematics

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Express the number in decimal notation.8.1 × 105

A. 81,000 B. 8,100,000 C. 405 D. 810,000

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Solve.The following table lists the number of crimes in the last few years in a US city.  Estimate the average number of crimes in these four years.

A. About 122 B. About 127 C. About 126 D. About 124

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Bob makes monthly deposits of $50 into a savings account that pays 5% interest, compounded monthly. How much will he have in his account at the end of 5 years?

a. $3,400.30 b. $3,150.00 c. $3,003.00 d. $3,833.58

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Find the domain of the rational expression.

A. {x|x is a real number and x ? 7} B. {x|x is a real number} C. {x|x is a real number and x ? 3} D. {x|x is a real number and x ? 3 and x ? 7}

Mathematics