A) h=9.9
if that's not correct, i've done these before, i don't know why it wouldn't work?
First. we use the Pythagorean theorem:

Add the numbers in

start simplifying


So, the leg has a length of 40 mm.
Answer:

Step-by-step explanation:
multiple the top exponents by 3 and the u subtract the bottoms
-5 over 8 times 2 over eight is -5 over 12! ♥️ good luck!