a disinfectant spray bottle says it eliminate 90% of bacteria with each application. you apply the disinfectant onve to a countertop in the shipping department and thrn apply the disinfevtant again to the same countertop. if the bottle is correct, what percentage of the bacteria originally on the tabletop have been eliminated?

Question

27-03-2018
Mathematics

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a disinfectant spray bottle says it eliminate 90% of bacteria with each application. you apply the disinfectant onve to a countertop in the shipping department and thrn apply the disinfevtant again to the same countertop. if the bottle is correct, what percentage of the bacteria originally on the tabletop have been eliminated?

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SamSamySamantha SamSamySamantha · Answer 1 · 2018-03-27T04:49:45+02:00

Well, I had to read twince to understand and Find out the answer!:D
XD
The answer would be 10% or 0%one of both
:Because if you disinfected it once and what was left (if bottle is correct) is 10% of bacteria.
And you swiped it again, then there should be 0% of bacteria,because
90%(first swipe)
=equals 10% left
then another swipe
90% -the 10% left would mathamatically equal 10% Dont you think?
Im sure, not positive, but sure.
Am I right?
Hope this helped!
2SamSamySamantha