Answer:
no
Step-by-step explanation:
The only question here seems to be ...
Have you ever been on or seen a ride like this at a fair or amusement park?
__
I have not seen such a ride.
Answer:

Step-by-step explanation:
Given:
Center of circle is at (5, -4).
A point on the circle is 
Equation of a circle with center
and radius 'r' is given as:

Here, 
Radius of a circle is equal to the distance of point on the circle from the center of the circle and is given using the distance formula for square of the distance as:
Using distance formula for the points (5, -4) and (-3, 2), we get

Therefore, the equation of the circle is:

Now, rewriting it in the form asked in the question, we get

Answer:
Mitochondria is the site where oxygen combines with small molecules and releases large amounts of energy.
Mitochondria is a cell organelle
It produces ATP, which is considered as energy currency of cell.