Question

I need help, please, I didn't understand you very well.

Answer 1

Answer: 30

Explanation:

Use Pythagorean theorem a^2 + b^2 = c^2:

18^2 + 24^2 = c^2

324 + 576 = c^2

900 = c^2

c = 30

Answer 2

30

Explanation: