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
Perimeter divided by base??
X greater than or equal to 5
The answer is 18
2 to the 3rd power would be 2*2*2 which is 8
8 x 4=32
32/2=16
16+2=18