Write the number in scientific notation.2,012,310
A. 2.01231 × 107
B. 2.01231 × 10-6
C. 2.01231 × 101
D. 2.01231 × 106
Answer: D
Mathematics
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10, 12, 8, 7, 6, 9, 11, 8
A. 10.14 B. 9 C. 8.88 D. 7.88
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Determine if matrix A is invertible.A = 
A. Not invertible B. Invertible
Mathematics
Write the set using set-builder notation.{. . . , -3, -2, -1, 0, 1, 2, 3, . . .}
A. {x?x is a natural number} B. {x?x is an integer} C. {-3, -2, -1, 0, 1, 2, 3} D. {x?x is an integer greater than -3}
Mathematics
Solve the problem.The table below shows the results of a consumer survey of annual incomes in 100 households. 
What is the probability that a household has an annual income of $25,000 or more?
A. 0.71 B. 0.43 C. 0.57 D. 0.28
Mathematics