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Which of the following number is written in the standard form?
(a.) \( 21.56 \times 10^{4} \)
(b.) \( 2.156 \times 10^{4} \)
(c.) \( 215.6 \times 10^{4} \)
(d.) None of these
Given:
There are four options given.
To do:
We have to find the number written in the standard form.
Solution:
Standard form:
Any number that we can write as a decimal number, between 1.0 and 10.0, multiplied by a power of 10, is said to be in standard form.
Among the given options, $2.156\times10^4$ is in the standard form as 2.156 is in between 1.0 and 10.0.
21.56 and 215.6 are not between 1.0 and 10.0.
Therefore,
Option B is the correct answer.
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