How do you work out $(3.2times10^5)times(4.5times10^4)$ ?

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Answer 1 · 2017-01-03T01:46:31

You multiply the numbers and add the 10-powers

$=(3.2xx4.5)xx(10^5xx10^4)$
$=14.4xx10^(5+4)=14.4xx10^9$

Since we want only one non-zero digit in front of the decimal point:
$=1.44xx10xx10^9=1.44xx10^10$

How do you work out (3.2times10^5)times(4.5times10^4)(3.2times10^5)times(4.5times10^4)?