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How many places to the left should the decimal point be moved to write 7.2 × 10-9 in standard form?
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How many places to the left should the decimal point be moved to write 7.2 × 10-9 in standard form?

User Ali Sajid
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Answer: To write a large number in scientific notation, move the decimal point to the left to obtain a number between 1 and 10. Since moving the decimal point changes the value, you have to multiply the decimal by a power of 10 so that the expression has the same value.

Explanation:

User John Li
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