David's pumpkin cost $8.22
His sister's pumpkin cost $4.98
They paid $13.20
Answer:
83
Step-by-step explanation:
x+7+90
x=83
Firstly , we can draw diagram
we can see that
adjacent = 850
opposite =250
so, we can use tan formula


16.38

so,
angle of depression is 16.38 degree........Answer
increase in x results in the decrease in y