We want to round the given decimal number and write the result as the product of a single digit and a power of 10.
0.00000278101Let's start by rounding the given number to the nearest 0.00000 1. Since the digit in the ten millionths place is greater than 5, we will modify the digit in the millionths place.
0.00000 2 7101 ≈ 0.00000 3
Finally we will write the above number as the product of a single digit and a power of 10.
To do so, let's first factor out 3.
