b. 24 mm
step-by-step explanation:
use the pythagorean theorem.
a^2 + b^2 = c^2
a^2 + 7^2 = 25^2
a^2 + 49 = 625
a^2 = 576
a = 24
answer: b. 24 mm
34
1) 2/5
2) zero=0/1
3) zero=0/2
4) -4/5
5) undefined=3/0