Which prefix has the multiplier 0.0000000000000001?

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Multiple Choice

Which prefix has the multiplier 0.0000000000000001?

Explanation:
In SI prefixes, each prefix adds a specific power of ten to a unit. The common ones here correspond to these multipliers: milli is 10^-3, micro 10^-6, nano 10^-9, pico 10^-12, and femto 10^-15. The number given, 0.0000000000000001, is 1 × 10^-16. There isn’t a standard SI prefix that equals 10^-16 exactly, so none of the listed options matches perfectly. The closest standard prefix is femto, which represents 10^-15—ten times larger than 10^-16. If you need to express 1 × 10^-16 with prefixes, you’d either write 0.1 × femto or, more precisely, use scientific notation 1 × 10^-16. The key idea is that prefixes don’t cover every exponent, and 10^-16 sits between femto (10^-15) and atto (10^-18).

In SI prefixes, each prefix adds a specific power of ten to a unit. The common ones here correspond to these multipliers: milli is 10^-3, micro 10^-6, nano 10^-9, pico 10^-12, and femto 10^-15. The number given, 0.0000000000000001, is 1 × 10^-16. There isn’t a standard SI prefix that equals 10^-16 exactly, so none of the listed options matches perfectly. The closest standard prefix is femto, which represents 10^-15—ten times larger than 10^-16. If you need to express 1 × 10^-16 with prefixes, you’d either write 0.1 × femto or, more precisely, use scientific notation 1 × 10^-16. The key idea is that prefixes don’t cover every exponent, and 10^-16 sits between femto (10^-15) and atto (10^-18).

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