A.) the 15th day, because you would the less common multiple is 15 of 3 and 5.
The area of a circle is

So we get

so we get 19.6 rounded to the nearest tenth
Now we subtract that from the area of the square which is 25
We get 5.4
So the answer shoild be 5.4ft
Hopefully this is correct and helps you!
A^2 + b^2 = c^2
8^2 + b^2 = 12^2
64 + b^2 = 144
b^2 = 144 - 64
b^2 = 80
b = sqrt 80
b = 8.9 ft <===
So We Know That tan(x) Equals

We Can Use Logic, We Know That Anything That Makes The Denominator 0, Will Not Work, So We Need To Know What Makes Sin(x) equal to 0 and Cos(x) equal to 1 or -1 BUT NOT 0


We Didn't Want Cosine To equal Zero Because Then We Get

THE ANSWER IS C : -360°,-180°,0°,180°,360°
The answer to this would be D