It says look at the above problem.
It is impossible for me to know the answer unless I know the above problem.
Answer:144
Step-by-step explanation: multiply the diameter by the height and that’s your volume(cubic inches)
Length x width x height
4 x 5 = 20
20 x 6 = 120 cm^3
Answer: 10 envelopes
Explanation: 28÷3=9.33
Now, I am assuming you can't have 9 1/3 envelopes, so I rounded up (which makes the answer 10).