Andrew runs 4 laps around a rectangular park 92 m long and 46 m wide. How much distance does he cover in 4 laps?
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David is mailing packages. Each small package costs him $2.90 to send. Each large package costs him $4.20 . How much will it cost him to send 3 small packages and 7 large packages?
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Redox is a type of chemical reaction in which the oxidation states of atoms are changed. Redox reactions are characterized by the actual or formal transfer of electrons between chemical species, most often with one species undergoing oxidation while another species undergoes reduction.
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