A total of 7,803,100 tourists visited Country A from the year 2018 to the year 2020. Round to the nearest place value, then express this number in the form of a single digit times an integer power of 1

Answer 1

To round the number 7,803,100 to the nearest place value, we consider the hundred-thousands place, which is the digit '8' in the number.

Looking at the digit to the right (the ten-thousands place), which is '0', since this is less than 5, we round down. Therefore, rounding 7,803,100 gives us 7,800,000.

Next, we express 7,800,000 in the form of a single digit times an integer power of 10. The number 7,800,000 can be written as:

\[ 7.8 \times 10^6 \]

So, the rounded number expressed in the desired form is:

7.8 × 10^6.