Question

How do you write `7.2times10^5` in standard form?

Answer 1

720 000

Explanation:

`7.2xx10^5" is already expressed in "color(blue)"standard form"`

I believe you mean express as `color(blue)"original number"`

To do this consider `10^5" or more generally" 10^n` where n is an integer.

• If n > 0 `color(red)"move decimal point n places to the right"`

• If n < 0 `color(blue)"move decimal point n places to the left"`

here n = 5 > 0, hence move decimal point 5 places to the right.

`rArr7color(red)(•)2to720000color(red)(•)`

`rArr7.2xx10^5=720 000`