Question

How do you simplify `(4 times 10^3)(7 times 10^2)`?

Answer 1

`2.8xx10^6 larr" Scientific notation"`

Explanation:

`(4xx7) xx 10^3xx10^2`

`28xx10^(3+2)" "->" "28xx10^5`

`2.8xx10^6 larr" Scientific notation"`
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`color(brown)("You can interchange the numbers as they are 'commutative'")`

Example: `2xx5` is the same as `5xx2`