Mentally Simplify the Quotient Without a Calculator $\left( 1.4 \times 10 ^ { - 30 } \right) \div \left( 7 \times 10 ^ { - 10 } \right)$

question 39

Multiple Choice

Mentally simplify the quotient without a calculator. $\left( 1.4 \times 10 ^ { - 30 } \right) \div \left( 7 \times 10 ^ { - 10 } \right)$

• A) \(2 \times 10 ^ { - 21 }\)
• B) \(2 \times 10 ^ { - 20 }\)
• C) \(2 \times 10 ^ { - 19 }\)
• D) \(2 \times 10 ^ { - 40 }\)
• E) \(0.7 \times 10 ^ { - 20 }\)

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