Question

Determine the product
$800.5\times \left(2\times {10}^6\right)$

• A. $1.7\times {10}^7$
• B. $1.601\times {10}^7$
• C. $1.7\times {10}^9$
• D. $1.601\times {10}^9$

Answer 1

The correct option is D $1.601\times {10}^9$

$=800.5\times (2\times {10}^6)$

$=8.005\times {10}^2\times 2\times {10}^6$

$=0.8005\times 2\times {10}^3\times {10}^6$

$=1.601\times {10}^{3+6}$ (Law of exponents)

$=1.601\times {10}^9$

$D$ is correct.