The sea ice around the south pole fluctuates between 18 million square kilometers in September to 3 million square kilometers in March. During how many months are there more than 15 million square kilometers of sea ice?
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As a rough approximation, we will assume that the decrease in area is directly proportional to time.
1. Calculate the number of months between September and March = 6
2. Calculate the total decrease in area
= (18-3) = 15 million square kilometers.
3. Calculate average decrease per month
= 15/6 = 2.5 million square kilometers per month.
Make a list of area each month
September : 18 million sq.km
October : 15.5 million sq.km
November : 13 million sq.km
December : 10.5 million sq.km
...
so during how many months are there more than 15 million square kilometers of sea ice?
To determine during how many months there are more than 15 million square kilometers of sea ice, we need to analyze the given data and calculate the number of months that meet this criterion.
The sea ice fluctuates between 18 million square kilometers in September to 3 million square kilometers in March. We need to determine the number of months when there is more than 15 million square kilometers of sea ice.
Let's break down the data:
- September: 18 million square kilometers
- March: 3 million square kilometers
To find the number of months with more than 15 million square kilometers of sea ice, we can compare each month's value with the threshold of 15 million square kilometers.
Based on the provided data, September has more than 15 million square kilometers of sea ice, as it has 18 million square kilometers. March does not meet this criterion as it has only 3 million square kilometers.
So, there is only one month (September) when there are more than 15 million square kilometers of sea ice.