Respuesta :

diene
405,000=4.05*10^5
Scientific notation is useful for writing very large or very small numbers without having to write a bunch of zeroes.
hurricanekatrina
In scientific notation it will be 4.05 x 10 raised to power 5 ... 
The advantage of this form is that it helps save our time and prevents us from writing big big numbers in small forms..
It helps us write big numbers without writing so many zeroes..