Answer:

Step-by-step explanation:
The change of distance over time of the plain A is 300 mi/hour and 200 mi/hour for plane B. O is the point of the airport.
So, the distance from A to O AO = 90 miles and BO = 120 miles.
Now, we have a right triangle here. We can use the Pythagorean theorem, so the distance between the planes will be:
(1)


If we take the derivative of the equation (1) we could find the change of the distance between planes.


Finally,

I hope it helps you!
Answer:
50%
Step-by-step explanation:
There are a total of 20 marbles.
10/20 equal 50%
8-7=1 3-4=1 5-2=3 So it is 311.
Answer:
6x+15
Step-by-step explanation:
If he runs 6.5 metres per second, then you multiply 6.5 by 4 to get 26m