Find the standard deviation. Round to the nearest tenth.44, 84, 45, 31, 80, 68, 70, 46, 85
A. 21.6
B. 7.7
C. 19.0
D. 20.2
Answer: C
Mathematics
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Express the number in scientific notation.29,000,000,000
A. 2.9 × 10-9 B. 2.9 × 1010 C. 2.9 × 10-10 D. 2.9 × 109
Mathematics
Write the fraction or mixed number as a percent. Write the percent as a simplified fraction or mixed number.
A. 
%
B. 
%
C. 83
%
D. 8
%
Mathematics
Solve the equation.(x - 2)(x + 4) = 0
A. {-2, 4} B. {2, 4} C. {2, -4} D. {2, -2, 4, -4}
Mathematics
Graph.f(x) = 4-x - 1
A. 
B. 
C. 
D. 
Mathematics