Respuesta :
the correct anwer is -21 and how i got that is by taking -7*300 to get -21 as my answer let me know if it helped any...
Since it says that it descended -7 after every second. It then say how much will it be after 300 seconds.
So...
-7 times 300 is 2100
so the position it will be at is -2100
Hope it helped!
So...
-7 times 300 is 2100
so the position it will be at is -2100
Hope it helped!