how come 4/3pi*.00015^3= 0.0000000000141372 but 4/3pi*.15= 0.6283185307179586 if its the same thing?
Is 0.00015^3 the same as 0.15?? Why don't you try 0.00015^3 and enter it in the calculator and see what you get. Then you will see the difference.
