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Mathematics, 19.07.2021 23:20 janyiareese12

From 1978 to 2008 the amount of lead allowed in the air in the United States was 1.5*10^-6 gram per cubic meter. In 2008 the amount was reduced by 90%. WHat is the new amount of lead allowed in the air?

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From 1978 to 2008 the amount of lead allowed in the air in the United States was 1.5*10^-6 gram per...
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