Question

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

$29,197,543$

Answer 1

$29,197,543\approx$$30,000,000$ (Rounding off to the nearest $10,000,000$)

$30,000,000=3\times 10,000,000$ (Factor out $3$)

$3\times 10,000,000=3\times {10}^7$ (Writing $10,000,000$ as power of $10$)

Hence, the result as a product of a single digit and a power of $10$ is $3\times {10}^7$.