Question

Round the number. Write the result as a product of a single digit and a power of $10.$

$0.000000647$

Answer 1

$0.000000647$$\approx 0.0000006$ (Rounding off to the nearest $0.0000001$)

$0.0000006=6\times 0.0000001$ (Factor out $6$)

$6\times 0.0000001=6\times {10}^{-7}$ (Writing $0.0000001$ as power of $10$)

Hence, the result as a product of a single digit and a power of $10$ is $6\times {10}^{-7}$.