Answer:
<h2>A) 3 cm</h2>
Step-by-step explanation:
The formula of a volume of a cylinder:

r - radius
H - height
We have r = 1cm and H = 21cm. Substitute:

The formula of a cone:

r - radius
H - height
We have V = 21π cm³ and H = 7cm. Substitute:
<em>divide both sides by π</em>
<em>divide both sides by 7</em>
<em>multiply both sides by 3</em>

Ur mom because she’s huge and so b would be equivalent to amazing things so ur mom
Subtract the 15 from the 133
you get 118
divide 29.50 from the 118
you get 4
4 people went to the concert