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Aarav writes the number 30,40,000 (thirty lakh forty thousand) for a census.
He must express it in standard form.
Which of the following is correct?

Class 7Standard FormNumber System

A $3.04 \times 1 0^{6}$
B $3.4 \times 1 0^{6}$
C $30.4 \times 1 0^{5}$
D $3.04 \times 1 0^{5}$

Step-by-Step Solution

Thirty lakh forty thousand = 3040000 (7 digits).

3040000 = 3.04 \times 1 0^{6}

. The internal zero between 3 and 4 must be kept.

Answer: A)

3.04 \times 1 0^{6}

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