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 10
To round the number of tourists to the nearest place value, we need to look at the digit to the right of the desired place value, which is the thousandths place (since we want a single digit times an integer power of 10).
The digit in the thousandths place is 0. Since it is less than 5, we round down the digit in the hundredths place (which is 0) to 0.
Therefore, the rounded number of tourists is 7,803,100.
Now, let's express this number in the form of a single digit times an integer power of 10:
7,803,100 = 7.8031 × 1,000,000
So, expressing it in the desired form, the number of tourists visiting country A from 2018 to 2020 is approximately 7.8031 × 10^6.
To round a number to the nearest place value, determine the digit in the desired place value and look at the digit to the right of it.
In this case, we want to round the number of tourists (7,803,100) to the nearest place value. Let's look at the digit in the nearest place value, which is in the millions place. The digit is 7.
Now, look at the digit to the right of the millions place, which is 8. Since 8 is greater than or equal to 5, we need to round up. This means we will increase the digit in the millions place by 1.
So, rounding 7,803,100 to the nearest place value gives us 7,900,000.
Now, let's express 7,900,000 in the form of a single digit times an integer power of 10.
To do this, we move the decimal point to the left until only one digit is to the left of the decimal point, and count the number of places we moved the decimal point.
Moving the decimal point from 7,900,000 to give us 7.9 gives us one place, so the expression is:
7.9 x 10^6
To round this number to the nearest place value, we need to look at the digit in the next place value which is the hundred thousands place. Since the digit in that place value is 0, we do not need to round up. Therefore, the rounded number is 7,800,000.
To express this number in the form of a single digit times an integer power of 10, we can represent it as 7.8 × 10^6.