3 years ago

Pls help, if u put a link I will report

1 answer:

5 0

The answer is A 9/10

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MaRussiya [10]

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Rus_ich [418]

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Ivenika [448]

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C is a function... all the others are not functions since it doesn't pass the line test.

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Assoli18 [71]

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marusya05 [52]

Step-by-step explanation:

$a^{-n}=\dfrac{1}{a^n}\\\\\text{therefore}\ 10^{-5}=\dfrac{1}{10^5}=\dfrac{1}{100000}=0.00001\\\\1.23\cdot10^{-5}=1.23\cdot0.00001=0.0000123$

$a\cdot10^{-n}$ - move the decimal point n place to the left

$a\cdot10^n$ - move the decimal point n place to the right

Examples:

$1.2\cdot10^5=1\underbrace{20000}_{5\to}=120,000\\\\1.2\cdot10^{-5}=0\underbrace{.00001}_{\leftarrow5}2=0.000012$

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3 years ago