First, that looks like Pearson and if it is, I'm so sorry for you.
Secondly, I think this answer is correct.
Answer:32 inches
Step-by-step explanation:
Using the pythagorean theorem
40²= 24²+ b²
simplify
1600 = 576 + b²
subtract 576 from both sides
1024 = b²
square root both sides
32= b
Pls i just need some points so i can ask questions um