Question
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?(1 point)
million
The largest place value of the numeric part of 12,345,000 is 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)
Rounded to the nearest place value, the number 7,803,100 can be expressed as 7.8 million (7.8 x 10^6).
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.(1 point)
times
To find out how many times higher the number of library visits before the examination day is compared to the number of visits in an average week, we can divide the visits before the examination day by the visits in an average week.
(2 x 10^3) / (5 x 10^2)
Simplifying this expression, we get:
(2 x 1000) / (5 x 100)
2000 / 500
4
Therefore, the number of library visits before the examination day is 4 times higher compared to the 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.(1 point)
To express $15,528.23 in the form of a×10n, we need to determine the value of a and n.
Given that the bank deposit amount is $15,528.23, we can rewrite it as 1.552823×10^4.
Therefore, a = 1.552823 and n = 4.
So, $15,528.23 can be expressed as 1.552823×10^4.