Express the following numbers in standard form: 3,18,65,00,000.

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3.1865

\times 1 0^{9}

31865

\times 1 0^{4}

318.65

\times 1 0^{9}

31.865

\times 1 0^{9}

answer is A.

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Detailed Solution

Concept- First write the number as the sum of its place values, and then we will expand it to get the standard form of the given number.
Number

= 3, 18, 65, 00, 00

0
Now, the standard form of

3, 18, 65, 00, 000 = 3 \times 1000000000 +

1 \times 100000000 + 8 \times 10000000 + 6 \times 1000000 + 5 \times 100000 + 0 \times 10000 + 0 \times 1000 + 0 \times 100 + 0 \times 10 + 0 \times 1

.
Standard form is

3.1865 \times 1 0^{9}

Hence, the correct answer is option 1.

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