It's a 45-45-90 triangle,
where the legs are congruent, and the hypotenuse is sqrt(2) times the length of a leg.
Answer: 1400 packages
Step-by-step explanation:
1150+1200+1900+1350 divided by the 4 day interval means and average of:
1400 packages per day
Plug the values (x,y)=(0,0) into the inequalities:

0 isn't greater than 0, no (0,0) is not a solution to either of these inequalities.
The answer is D.
2.73972603 or ... you can round to the nearest tenth... 2.7