Step-by-step explanation:
explain step by step on photo, double check just in case
Abd is a right angled triangle so by pythagoras we know

and to calculate h we need to use the sine rule

i hope this helps
Answer:
12 feet
Step-by-step explanation:
sinR = 
noting that the sin ratio = 
opposite to ∠P is QR and hypotenuse is PQ ( opposite right angle )