Prior to 1982, penny dates' history
Years weight (Mass)
[tex]1793-95[/tex] [tex]$13.48 \mathrm{gm}$[/tex]
[tex]$1795-1857$[/tex] [tex]$10.89 \mathrm{gm}$[/tex]
[tex]$1856-1864$[/tex] [tex]$4.67 \mathrm{gm}$[/tex]
[tex]$1864-1942$[/tex] [tex]$3 \cdot 11 \mathrm{gm}$[/tex]
[tex]1943$\\[/tex] [tex]$2.72 \mathrm{gm}$[/tex]
[tex]$1944-46 \quad[/tex] [tex]3.11 \mathrm{gm}$[/tex]
[tex]$1947-62$[/tex] [tex]$3 \cdot 11 \mathrm{gm}[/tex]
[tex]$1962-82 \quad[/tex] [tex]3.11 \mathrm{gm}$[/tex]
How many pennies are post-1982 in number
Years weight (Mass)
[tex]1982 - present $\quad[/tex] [tex]2.5 \mathrm{gm}$[/tex]
Then,
(C) Total no. of pennies =( No. g pennies duted before 1982)
+(No.g pernies duted after 1982) [tex]$=(8+1)$[/tex]
Total no. of Pennies =9
Over the past ten years, the cost of copper has more than doubled. Therefore, depending on the metal it contains, a penny made before 1982 is worth 2.2 cents. The U.S. Mint banned the melting down of pennies for financial gain in 2007.
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