Two planes leave the airport at the same time. One plane heads directly south at 550 mph. The other plane heads directly west at 300 mph. Assuming both fly at the same elevation, how quickly is the distance between them increasing 3 hours after takeoff (rounded to the nearest mile per hour)?

4

step-by-step explanation:

the formula for the equation of a circle is (x – h)2+ (y – k)2 = r2, where (h, k) represents the coordinates of the center of the circle, and r represents the radius of the circle. if a circle is tangent to the x-axis at (3,0), this means it touches the x-axis at that point.

my dear correct answer is option number 3

the formula of a midpoint between a abd b: