9. What is the amount of fluoride concentration in water that's considered safe for the prevention of dental decay? A. 0.25 part per million B. 2 parts per million C. 0.5 p…

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asked Feb 8, 2019 102k views

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FrozenKiwi · Answer 1 · 2019-02-15T21:43:55+0000

Hi,

9. What is the amount of fluoride concentration in water that's considered safe for the prevention of dental decay?

D. 1 part per million