We can add up the first four terms in the sequence 2n1. R times nr. 2n1 3 5 7 9 24.
So V of 3 is equal to 43 pi-- and instead of r cubed I would write 3 cubed-- 43 pi 3 cubed.
This will be the exponent on the power of ten. Count the number of times that you moved the decimal. Write the expanded notation of the following numbers. And usually you have to read a book or article on the general subject.