Answer:
I believe your answer is z5√z the fourth option
Firstly , we need to draw diagram
we are given
opposite =300
adjacent =750
now, we can use tan formula

now, we can find x

we get

so,
angle of depression is 21.8 degree.....Answer
John sold 30U
Rick sold 25U
So, Rick sold 5 fewer units than John.
Hope that helps.