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Question

Evaluate the product of $2.3 \times 10^{4}$ and $3 \times 10^{3}$ .
$6.9 \times 10^{7}$
$6.9 \times 10^{4}$
$6.9 \times 10^{8}$
$6.9 \times 10^{6}$

A

6.9 \times 10^{7}

B

6.9 \times 10^{8}

C

6.9 \times 10^{4}

D

6.9 \times 10^{6}

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Solution

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$(2.3 \times 10^{4}) \times (3 \times 10^{3})$
$\Rightarrow (2.3 \times 3) \times (10^{3 + 4})$
$∴ 6.9 \times 10^{7}$
Ans- Option $B$ .

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