Answer:
C
Step-by-step explanation:
28n^4 +16n^3 -80n^2
we can factor out a 4n^2
4n^2 (7n^2 +4n - 20)
4n^2 (7n-10) (n+2)
it took the plane 5 hours to get there and now that you know the time it took for the plane to get there divide it by the miles which equals 300 miles per hour
