help! how do I do this??

Answer:
15 ft
Step-by-step explanation:
Using sinus law
sin(A) /a = sin(B) /b = sin(C) /c
Where smale letters indicate the sides
For this question :
(sin(90)*12)/sin(53)=15
Answer:
9.58
Step-by-step explanation:
Sin=opposite/hypotenuse
sin53=12/length of slide
Length of slide=12sin53
=9.58