tntaylor862
15.11.2019 •
Mathematics
It is recommended to drink eight glasses of water every day. with tap water this would cost $0.49 a year. how much would this cost if a person only purchased bottle water?
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Ответ:
2a = a + PTR/100
2a = a + 5aT/100
2a = a(1+T/20)
2=1+T/20
T=20 yrs