15 students have roles and 25 do not I hope this is right or at least helps :)
The area of the circle is approximately 50
<h3>Areas</h3>
The area of a shape is the amount of space occupied by the shape
<h3>Area of circle</h3>
Given the three radius of the circle, the area of the triangle is calculated using:

From the figure, we have:
--- the radius
So, we have:



Approximate

Hence, the area of the circle is approximately 50
Read more about areas at:
brainly.com/question/10117243
It's d) 23 would be the answer
I do believe it is answer c, but not 100% on that due to the fact that when i worked it i got c, but when i googled alot got other answers. sorry i know thats not much help
5/2 is the slope on this graph.