The centre of a circle is at (4,1). A point that lies on the circle is at (-8,-4).
Find the equation of the circle.

What situation is an example of an observational study

The height of a flare fired from the deck of a ship in distress can be modeled by h(t)= -2(8t^2-52t-28), where h is the height of the flare above water and t is the time in seconds. a. find the time it takes the flare to hit the water.

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0