1.
*0.3,0.4,0.7
0.3[tex] ^{2} [/tex] + [tex] 0.4^{2} [/tex] = [tex] 0.7^{2} [/tex]
0.09 + 0.16 = 0.49
0.25 = 0.49
that is not true
2.
*7, 9, 13
[tex] 7^{2} + 9^{2} = 13^{2} [/tex]
49 + 81 = 169
130 = 169
that is not true
3.
*10, 24, 26
[tex] 10^{2} + 24^{2} = 26^{2}
[/tex]
100 + 576 = 676
676 = 676
that is true so the answer is c