Question

What is 0.00000000472 estimated as the product of a single digit and a power of 10?

Answer 1

First express 0.00000000472 in scientific notation.
Then round it so there is just a single digit times a power of 10:

\(\large 0.00000000472 = 4.72 \times 10^{-9} \approx 5 \times 10^{-9}\)

Answer 2

Thank Yoouu