Answer:
3
Step-by-step explanation:
In a 30-60-90 triangle, the ratio of the shorter side to the longer side length is
. Therefore:

Hope this helps!
You would multiply 4 by 72 then u multiply 4 * -6 then after that you would add 15
∠P~=∠S
∠Q ~= ∠T
∠R~= ∠M
P/S=Q/T=RM
hope this helps!