Question

I need help please help me. This is hard.

Answer 1

r=3.399

Explanation:

82.3=1/2(4/3pir^3)

164.6=4/3pir^3

164.6*(3/4) = 123.45=pir^3

123.45/pi=39.2953554494=r^3

cube root of 39.2953554494 =3.399

r= around3.4