Answer
<h2><u><em>
3 boxes</em></u> </h2>
Step-by-step explanation:
So she needs to give 25 pencils to each student.
1 box = 12
number of boxes = 25/12
=2.08
round it to 3
<h2><em>
Therefore she need </em><u><em>
3</em></u><em>
boxes</em></h2>
<em></em>
Volume of a sphere: V=(4/3)πr³
V1=(4/3)π10³
V2=(4/3)π5³
difference: (4/3)π10³-(4/3)π5³=(4/3)π875=3665
the answer is B.<span />
I think its 0 hope I helped