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.
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To solve this problem, we need to round the number 7,803,100 to the nearest place value, and then express it in scientific notation.
Step 1: Rounding to the nearest place value
Looking at the digit to the right of the ones place, which is the hundreds place, we see that it is 0. Since the digit 0 is less than 5, we can round down the number.
Step 2: Express in scientific notation
To express the rounded number in scientific notation, we count the number of decimal places we moved the decimal point to round the number. In this case, we did not move the decimal point, so there are zero decimal places.
The rounded number is 7,803,100.
Step 3: Express in the form of a single digit times an integer power of 10
To write this in scientific notation, we start by moving the decimal point to the left until there is one non-zero digit to its left. In this case, we need to move the decimal point 6 places to the left.
7,803,100 can be written as 7.8031 x 10^6.
So, 7,803,100 tourists can be expressed as 7.8031 x 10^6.
To express the number 7,803,100 in the form of a single digit times an integer power of 10, we need to round it to the nearest place value.
The nearest place value is to the nearest million, which is 8 million.
Therefore, the number 7,803,100 can be expressed in the form of a single digit times an integer power of 10 as:
8 × 10^6
7,803,100 can be rounded to 7,800,000.
7,800,000 can be expressed as 7.8 × 10^6.