Answer:
never
Step-by-step explanation:
5 degrees above zero is never a negative, it's positive
The answer to your question is
1/4 kilometer = 0.25 kilometers = 250 meters
You answer is 250 meters
N = ((n-1) + 4) + 4, to my understanding.
although your answers seem right written in the columns, but your method of applying numbers to equation seems incorrect in 'expand' column. for example, answer for 3 should be something like this...
3 21 17+4
4 25 21+4
hope it helps.