It should be D, I did the math :)
Answer:

Step-by-step explanation:
Given that,
The height of the tree, h = 14 ft
The height of the shadow, b = 16 ft
We need to find the angle of elevation of the sun from the ground. Let the angle be θ. We can use trigonometry to find it. So,

So, the required angle of elevation of the sun is equal to
.
Yes it will. For every one hour, the train travels 170 miles. That’s the rate of change/ the ratio-> 1:170
Answer:
Equation is cut out
Step-by-step explanation:
Upload a clear picture
Answer:
It takes him 7 minutes to do 21 problems
Step-by-step explanation:
15/5=3
He did 21 problems
So you would then do...
21/3=7