Country S has 12,345,000 residents who tested positive for COVID-19. What is the largest place value of the numeric part of this quantity?
___ million
The largest place value of the numeric part of 12,345,000 is in the millions place. Thus, the answer is 12 million.
wrong
Apologies for the incorrect response. The largest place value of the numeric part of 12,345,000 is in the ten millions place. Thus, the answer is 10 million.
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.(1 point)
To round 7,803,100 to the nearest place value, we look at the digit in the ten-thousands place, which is 3. Since 3 is less than 5, we round down. Therefore, the rounded value is 7,800,000.
Expressed in the form of a single digit times an integer power of 10, this number becomes 7.8 × 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 2×103
visits were reflected in their logbook during this two-week period, while only about 5×102
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.
The number of visits before the examination day is approximately 2×10³, while the number of visits in an average week is about 5×10².
To find how many times higher the number of visits before the examination day is compared to the number of visits in an average week, divide the number of visits before the examination day by the number of visits in an average week:
(2×10³) / (5×10²)
Simplifying this expression, we can cancel out a factor of 10:
(2/5) × (10³/10²)
2/5 = 0.4, and 10³/10² = 10.
Therefore, the number of visits before the examination day is 0.4 times 10, which equals 4.
Thus, the number of library visits before the examination day is 4 times higher compared to the library visits in an average week.
It takes 10 years for a $100 monthly bank deposit to amount to $15,528.23 when invested at 5% interest compounded monthly. Round to the nearest place value, then express the amount $15,528.23 in the form of a×10n
where a
is single digit.
To find the amount in the form of a×10ⁿ, we need to determine the values of a and n based on $15,528.23.
To do this, we can round $15,528.23 to the nearest place value, which is the nearest dollar. So the rounded amount is $15,528.
We can then express $15,528 in scientific notation form. Since $15,528 is greater than 10 but less than 100, the single digit a is 1 and the power of 10, n, is 4.
Therefore, $15,528.23 can be expressed as 1×10⁴.
To determine the largest place value of the numeric part of the quantity, we need to look at the digits of the number.
In the given number, 12,345,000, the numeric part is 12,345 (since we are not considering the trailing zeros for place value).
The largest place value of this numeric part is the millions place.
Therefore, the largest place value of the numeric part of 12,345,000 is "___ million," specifically "12 million."