> you will see that adding twice 99% of the speed of light brings you to something like 99,9999% of the speed of light That seems like too many nines... why wr

> you will see that adding twice 99% of the speed of light brings you to something like 99,9999% of the speed of light That seems like too many nines... why write the formula, and then not bother running the numbers through it? (.99+.99)/(1+.99*.99) is roughly 99.995%