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Mathematics, 15.10.2020 03:01 zahradawkins2007

In 1982, the US Mint changed the composition of pennies from all copper to zinc with copper coating. Pennies made prior to 1982 weigh 3.1 grams. Pennies made since 1982 weight 2.5 grams. If
you have a bag of 1374 pennies, and the bag weighs 3846.6 grams, how many pennies from each
time period are there in the bag?
Number of pennies made prior to 1982:
Number of pennies made after 1982:

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