What is the volume of a sphere that has a 12m diameter?
a) 4070m^3
b) 509m^3
c) 7230m^3
d) 904m^3

Volume of Sphere = (4/3)*(pi)*(r^3)
 
                            r = (D/2) = 6 m
                        
                              =(4/3)*(pi)*((6^3)

                              = 904.7786.. m^3
I hope this helps.

J= r + 9 because since jessica rode 9 more miles than roger, you add 9 miles to rogers mileage.