Respuesta :

suspho

you need the volume, and the baloon is a sfere

you have the diameter that is 2 * r

7 : 2 = 3.5 cm (r)

V = 4/3πr³

V = 4/3 * 3.14 * 3.5³

V = 179,59 cm³ (you can round to 179.6)



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