Answer:
<h2>10, 7.5, 5.625, 4.21875, ...</h2><h2>160, 40, 10, 2.5, ...</h2><h2>20, 70, 245, 857.5, ...</h2><h2>5, 5.5, 6.05, 6.655, ...</h2>
Step-by-step explanation:







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>


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

</h3>

・ .━━━━━━━†━━━━━━━━━.・
<h3>Third</h3>


・ .━━━━━━━†━━━━━━━━━.・
<h3>Fourth</h3>



・ .━━━━━━━†━━━━━━━━━.・
<h3>Fifth </h3>



・ .━━━━━━━†━━━━━━━━━.・
<h3>Sixth</h3>



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Answer:
C.(3|-4)
Step-by-step explanation:
22 students per class
88/4 = 22