Answer:
The appropriate answer is "N, B >= 0". A further explanation id provided below.
Explanation:
According to the question,
The linear programming model seems to be formulated as:
⇒ [tex]Max \ 0.07 \ N+0.06 \ B[/tex]
Now,
⇒ [tex]N+B<=85[/tex]
[tex]N<=55[/tex]
⇒ [tex]6N+4B<=410[/tex]
[tex]N,B>=0[/tex]
Thus, the above is the correct answer.