Please help I’ll mark you as brainliest if correct!

12

Step-by-step explanation:

first see how much ways we can package the cookies using the 33 cookie packages:

33, 33

33, 11, 11, 11

33, 11, 11, 11 ones

33, 11, 22 ones

33, 33 ones

now only the 11 packages:

11, 11, 11, 11, 11, 11

11, 11, 11, 11, 11, 11 ones

11, 11, 11, 11, 22 ones

11, 11, 11, 33 ones

11, 11, 44 ones

11, 55 ones

now we have one more set, 66 ones.

if you count all the possibilities, you get 12

phosphate, calcium ion, chloride ion, neon atom

step-by-step explanation:

19.side- angle- side

20. angle- side- angle

step-by-step explanation: