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A droplet of oil drops onto the surface of a bowl of water. The surface that the oil covers is twice the surface that it covers a minute ago. If it takes 4 minutes to cover the whole surface of the bowl of water, when does the oil cover 1/4 of the surface of a bowl of water?

 May 25, 2021
 #1
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Doubles every minute        so    at 3 minutes it was   1/2 covered     at 2 minutes it was 1/4 covered

 May 25, 2021
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IMTHEBEAST  May 25, 2021
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I am a member.....I don't always sign in.....

ElectricPavlov  May 25, 2021

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