
Here's the solution ~
As we know, we can calculate the circumference of a circle in terms of its diameter as :

where, c = circumference and d = diameter
And also, circumference of circle is terms of radius (r) is :

Now, let's move on to questions ~
<h3>First </h3>


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<h3>Second</h3><h3 /><h3 /><h3 /><h3>

</h3>

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<h3>Third</h3>


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<h3>Fourth</h3>



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<h3>Fifth </h3>



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<h3>Sixth</h3>



➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖➖
To find the median of 20 values, list the values from smallest to largest then add the 10th and 11th number then divide by 2 and you get your median.
Answer:
the number of weeks is unknown the A represents the number of weeks so the answer is 100a