1)what's the recommend amount of uv protection that sunglasses should provide? a.50% b.75% c.80% d.100%2)one way to ensure good sleep hygiene is to change your bedtime frequently.truefalse

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asked Feb 25, 2018 83.6k views

1 vote

1)what's the recommend amount of uv protection that sunglasses should provide?

a.50%
b.75%
c.80%
d.100%2)one way to ensure good sleep hygiene is to change your bedtime frequently.truefalse

Physics
high-school

Cody Konior asked

by Cody Konior

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4 votes

C is the answer. !? 80%

James LT answered Feb 25, 2018

by James LT

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4 votes

C.) 80% is the answer...

Rob Rolnick answered Mar 1, 2018

by Rob Rolnick

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