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  • 25-02-2019
  • Mathematics
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After how many hours is the battery power at 75% if the battery decreases by 20% per hour

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Аноним Аноним
  • 25-02-2019

Answer:2.5

Step-by-step explanation:

Answer:

If the battery starts completely charged then after one hour it will be at 80% so at two hours it will be at 60. and there is 60 minutes in one hour so it goes down 10% in 30 minutes so it goes down 5% in 15 so it goes down 2.5% in 7.5

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