D hope this helps byeeeeee
We know that :

From the figure, We can notice that :
Ф Adjacent side length = 8
Ф Hypotenuse length = 11



Since 1 batch is 2.5 cups and he needs to save 6.. what you'll do is subtract 16-6. The. You create a proportion.. You cross multiply then divide..
Answer:2
\left(-3\times \:3\right)+15-2^2
=-9+15-2^2
-9+15-4
=6-4
6-4=2
the answer is 2