Answer:
-7
Step-by-step explanation:
Seems like the pattern is adding and then subtracting the next square number up:
7 + 4 = 11
11 - 9 = 2
2 + 16 = 18
so 18 - 25 = -7 is the next number
113.1cm
area= r²
r= half the diameter r=6
a=6²
a=36
a=113.1 cm
one , i guess....
because the conjecture is only true if it satisfies all the cases.