Answer:
The velocity is 8.93 meters/second.
Step-by-step explanation:
It is given that Elena runs for 28 seconds and finishes at 250 meters.
Here the displacement is 250 meters and the time is 28 seconds.
We know that 
Substitute displacement = 250 and time = 28 in above formula.

meters/second
Hence, the velocity is 8.93 meters/second.
Bruh u don’t no this is easy
3.1415926535 is the ones I have memorized. Shouldnt need to know more then that
Answer:
An aeroplanes velocity changes from 1250m/s as it comes down to land . It accelerates at 4.9m/s² . Calculate how long it took to come to a stop ?
Step-by-step explanation:
i am sorry in never answeres ur question but pls can u help me i am struggling
3543.72 cm^2.
Hopefully it helped ya