Answer:
As shown in the attached figure we have

Now we have 
Thus angle of depression is 
Answer: we can’t see graphs but I can help you if you show me them
Step-by-step explanation:
Answer:
-10
Step-by-step explanation:
Substitute 5 into the equation
(-5)2
Simplify and get -10
Answer:
His collection increased in a 20%.
Step-by-step explanation:
If 100% represents 10 records, what percentage would be for 12 records?
x = 12 100% / 10 = 120%
So, if we subtract 120% - 100%, it's gonna result in a difference of 20%, which means that 12 represents a 20% more, or his collection increased in a 20%.
Answer: 907.92 ft²
Step-by-step explanation:
1. To solve this problem you must apply the formula for calculate the area of a circle, which is shown below:

Where r is the radius of the circle.
2. You know the radius of the circle B, therefore, when you susbtitute it into the formula, you obtain that the area of the circle B is:
