Question

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

• A. $6.9\times {10}^4$
• B. $6.9\times {10}^7$
• C. $6.9\times {10}^8$
• D. $6.9\times {10}^6$

Answer 1

Answer: (B)

$6.9\times {10}^7$

$(2.3\times {10}^4)\times (3\times {10}^3)$
$\Rightarrow (2.3\times 3)\times \left({10}^{3+4}\right)$

$\therefore 6.9\times {10}^7$

Ans- Option $B$.