You start by subtracting: 16000-1200= 14800
Then you divide 14800 by how many feet the plane rises per minute
14800/945=16 minutes
The answer is 16 minutes
It makes and obtuse right triangle.
8.4 because 6 would round up to 10 and 10+30 =40 for 8.40 or just 8.4
If you are looking to turn it into an expression:
1/3w+16
or it could possibly be (if you are looking at inequalities):
1/3w<16