Is there a picture we can look at ?
Answer: AC=12 cm
Step-by-step explanation:
To solve this problem you must apply the law of sines, as you can see below:

Where:
a=13
A=85.2°
B=71.6°
Therefore, you must solve for b, then, you obtain that the lenght AC asked in the problem above is:

Answer:
x=7
Step-by-step explanation:
by pythagoras, 25^2=24^2+x^2
solve for x