Answer:
A. 15.6
Explanation:
Do a² + b² = c²
Your a is 8 and you b is 12 plug in
8² + 12² = c²
64 + 144 = c²
208 = c² (square root them)
14.4 = c
15.6 is the closest to 14.4
And the person who you are txting if it says *not delivered they prob blocked you.
Hope this helps ya! Keep smiling!