Answer:
749.2270267 or 749.9087619
Explanation:
Volume of a hemisphere=2/3πr³
Volume of a hemisphere=2/3*22/7*7.1³
Volume of a hemisphere=2/3*22/7*357.911
Volume of a hemisphere=749.9087619
If you calculate π with 3.14, I think you'll get about 749.2270267