Question

Write 0.000021 in standard form

Answer 1

Answer:

$10^{-\\ 5}$

Answer 2

$\underline{ \pink { Scientific \: notation : }}$

Very large or small numbers can be expressed in the simplest form by using scientific notation.

In this notation any number can be written as the product of a number 'x' such that 1 ≤ x < 10

and a power of 10.

$Here , Given \: number \: 0.000021$

$Standard \: form \: of \: 0.000021 \\= 0.000021 \times \frac{ 100000}{100000} \\= \frac{ 0.000021 \times 100000}{10^{5}} \\=\frac{ 2.1 }{10^{5}} \\= 2.1 \times 10^{-5}$

Therefore.,

$\red{Standard \: form \: of \: 0.000021} \\\green { = 2.1 \times 10^{-5} }$

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