Question

APPROXIMATING A LARGE NUMBER

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

$28,007,806,203$

Answer 1

$28,007,806,203\approx 30,000,000,000$ (Rounding off the number to closest $10,000,000,000$)

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

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

Hence, the final result is $3\times {10}^{10}$.