How do you write 7,930,000,000 in scientific notation?
The number that has the biggest impact if it is the one that is changed. It is called
It is the 7 as it is counting in the biggest units.
I say the next bit the way I do to avoid some classic mistakes that occur.
Keeping the decimal place where it is, 'slid' the number 9 places to the right so that you end up with:
We have reduced its value by a factor
In principle we have multiplied the original value by