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10-02-2019
Mathematics

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The amount of algae covering the Smith's backyard pond doubled every day until it was completely covered in algae on day 30 of the month. On what day of that month was 75% of the pond algae-free?

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kgujghjgf kgujghjgf

11-02-2019

the 3rd day is the correct answer

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20kzhan 20kzhan

01-04-2021

Answer:

To solve this problem, work backwards.

On day 30, it is 100% algae.

On day 29, it is 50% algae.

On day 28, it is 25% algae(or 75% algae free).

It was on Day 28.

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