Answer:
65
Step-by-step explanation:
a^2 + b^2 = c^2
39^2 + 52^2 = c^2
1,521+2704 = c^2
4,225 = c^2
Find the square root of both
65 = c
175.93cm²
5.4332, 7.7, 7.03, and then 7.73
red or 1/a9
with that it is
a^ (3-12)
a^ (-9)
and then you can't have -9 in the top so you put it on the bottom
1/ a^9
the answer is B hope i helped