Is-7.832198653 rational or irrational

Do you mind if you guys me with this question i’m on number 8

An unknown number x is at most 10. which graph best represents all the values of x? number line graph with closed circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the left. number line graph with closed circle on 10 and shading to the left.

Find the center of the circle that can be circumscribed about efg with e(4,4) f(4,2) g(8,2)