Answer: 284.7
Step-by-step explanation:
radius of cone and hemisphere are the same
volume of half sphere=(1/2)*(4/3)*[tex]\pi r^{3}[/tex]
                  =(1/2)*(4/3)*3.14*[tex]4^{3}[/tex]            (4*4*4=64)
                  =133.97333
                  =133.97
volume of cone= (1/3)[tex]\pi r^{2}[/tex]h
             =(1/3)*3.14*[tex]4^{2}[/tex]*9                    (4*4=16)
             =150.72
total volume=133.97+150.72
          =284.69
          =284.7
