A carpenter has 28 nails from a previous job and needs to buy more. A store has 7 boxes of nails and each box contains 100 nails. The carpenter needs to buy at least 3 boxes. The number of nails the carpenter will have after purchasing n boxes is represented by a function.

http://prntscr.com/diakpr

Question

A carpenter has 28 nails from a previous job and needs to buy more. A store has 7 boxes of nails and each box contains 100 nails. The carpenter needs to buy at least 3 boxes. The number of nails the carpenter will have after purchasing n boxes is represented by a function. 

http://prntscr.com/diakpr

kittiwitti1 · Answer

He needs to buy at least 3 (so the domain starts at 3) and the store has only 7 boxes (domain ends at 7)

kittiwitti1 · Answer

$$\{D~|~3\le n\le7\}$$

kittiwitti1 · Answer

C) is a range

yuii · Answer

So either between A or B...

kittiwitti1 · Answer

D) is impossible.
Yeah... I would say integers.
Was the last one wrong?

yuii · Answer

I don't know since my assignments have five questions each and they don't score it until I answer all of them, so.

kittiwitti1 · Answer

Aww... :(

yuii · Answer

So, hopefully these are the right answers.

kittiwitti1 · Answer

Google says: "Integers"

kittiwitti1 · Answer

OH because "real" includes irrational numbers! $\pi$ is a real number but it sure isn't rational. :o

kittiwitti1 · Answer

And I'm pretty sure your results will always be rational, so INTEGERS