Step-by-step explanation:
V=pi r^2h
V=3.14x3^2x7
=197.82
D: because there are 2 4/4 which is 2 plus 14/4 bc that’s the rest added up so all together that is 22/4 which reduced by half is 11/2
Hope this helps you out !
The inequality for this would be n ≥ 20.
We know this because it must be larger than 40. We also know it can possibly be equal because the statement says "at least".
