help with (b) I had ended up with 7234.56

 

   help with (b) I had ended up with 7234.56 . . . but it came out incorrect...     

 

   V  =  (4 / 3) π r³     

       =  (4 / 3) • 3.1416 • (6 ft)³     

       =  (4 / 3) • 3.1416 • 216 ft³     

       =  904.7808 ft³     

   You got 7234 because you cubed the diameter instead of the radius.     

   _.