How do you divide #\frac { 0.8\times 10^ { - 7} } { 4\times 10^ { - 4} }#?

2 Answers
Aug 31, 2017

Answer:

#2 * 10^-4#

Explanation:

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Aug 31, 2017

Answer:

#2xx10^(-4)#

Explanation:

#(color(red)(0.8xx10^(-7)))/(color(green)(4xx10^(-4)))#

This is the same as #color(red)((0.8color(green)(xx10^4))/(color(green)(4)xx10^7))#

Which is also the same as #(8xx10^3)/(4xx10^7)#

This is the same as #2xx10^(3-7)" "=" "2xx10^(-4)#