Answer:
20 units squared
Step-by-step explanation:
Use pythagorean theorem to find third side of triangle


Take the sqr root of 20

So the side of the square is sqr root of 20
Area is length x width
The area of a square is 2 times s, where s is the length of one side since a square sides are all equal.
So

Answer:
(3,8)
Step-by-step explanation:
The absolute value function is defined as

If x is strictly positive (x > 0), then |x| = x, and d|x|/dx = dx/dx = 1.
If x is strictly negative (x < 0), then |x| = -x, and d|x|/dx = d(-x)/dx = -1.
But if x = 0, the derivative doesn't exist!
In order for the derivative of a function f(x) to exist at x = c, the limit

must exist. This limit does not exist for f(x) = |x| and c = 0 because the value of the limit depends on which way x approaches 0.
If x approaches 0 from below (so x < 0), we have

whereas if x approaches 0 from above (so x > 0), we have

But 1 ≠ -1, so the limit and hence derivative doesn't exist at x = 0.
Putting everything together, you can define the derivative of |x| as

8.09589041
Remember to round your number
THE ANSWER IS 8.10