D, because there are several students that are in your school. There would be many different answers.
Answer:
B.
Step-by-step explanation:
Have a good day i hope this helps :)
Check the picture below.
now, the "x" is a constant, the rocket is going up, so "y" is changing and so is the angle, but "x" is always just 15 feet from the observer. That matters because the derivative of a constant is zero.
now, those are the values when the rocket is 30 feet up above.

<span> A compound event is a combination of two or more simple events.</span>