at a shop a pencil casts 0.65 dollar and a pen costs 1.20 dollar .Kate bought 6 pens at a discount of 10 percent.how much did Kate pay for the pens?
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Answer:
Calcium carbonate (limestone or chalk) decomposes into calcium oxide and carbon dioxide when heated.
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Answer:
1.20dollar=7.2 dollar -10 %=7.2-0.72 dollar=6.48 dollar
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