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 time an integer power of 10.
To round the number 7,803,100 to the nearest place value, we look at the digit in the hundred thousands place, which is 3. Since 3 is less than 5, we round down the number, which means the nearest place value is the hundred thousands.
Expressing this number in the form of a single digit times an integer power of 10, we write it as 7.8 × 10⁶.
Therefore, a total of 7,803,100 tourists visited country A from the year 2018 to the year 2020 can be expressed as 7.8 × 10⁶.
thats not right
Apologies for the mistake. Let's correct it.
To round the number 7,803,100 to the nearest place value, we look at the digit in the ones place, which is 0. Since 0 is less than 5, we round down the number, which means the nearest place value is the millions.
Expressing this number in the form of a single digit times an integer power of 10, we write it as 7 × 10⁶.
Therefore, a total of 7,803,100 tourists visited country A from the year 2018 to the year 2020 can be expressed as 7 × 10⁶.
Two weeks before an examination day, a librarian monitored the number of students who visited the library. Then they compared it with the number of visits made in an average week. Approximately 2×10^3
visits were reflected in their logbook during this two-week period, while only about 5×10^2
were reflected on an average week. How many times higher is the number of library visits before examination day compared to the library visits in an average week? Your answer should be a whole number.(1 point)
To find out how many times higher the number of library visits before the examination day is compared to the library visits in an average week, we need to divide the number of visits before the examination day by the number of visits in an average week.
Number of visits before examination day = 2 × 10^3
Number of visits in an average week = 5 × 10^2
Dividing the number of visits before examination day by the number of visits in an average week:
(2 × 10^3) / (5 × 10^2)
To simplify this division, we can divide the coefficients and subtract the exponents of the powers of 10:
(2 / 5) × 10^(3-2)
= (2 / 5) × 10^1
= 0.4 × 10^1
= 4 × 10^0
= 4
The number of library visits before the examination day is 4 times higher than the number of visits in an average week.
Therefore, the answer is 4.
To round the number 7,803,100 to the nearest place value, we need to look at the digit in the next place after the desired place value, which is the hundred thousands place in this case.
The digit in the next place is 1, which is less than 5. So, we will round down.
Therefore, rounding 7,803,100 to the nearest hundred thousands gives us 7,800,000.
To express this number in the form of a single digit times an integer power of 10, we can write it as 7.8 × 10^6.
To round the number of tourists to the nearest place value, we need to look at the digits after the place value we are rounding to. In this case, we will round to the nearest thousand.
The number of tourists, 7,803,100, has six digits after the thousands place. The digit immediately to the right of the thousands place is 1. Since 1 is less than 5, we round down and keep the thousands place digit the same.
Therefore, rounding 7,803,100 to the nearest thousand gives us 7,803,000.
To express this number in the form of a single digit times an integer power of 10, we can rewrite it as 7.803 × 10^6.
So, the answer is 7.803 × 10^6.