Water Lilies Doubling Days

Water lilies grow on the pond, and their number doubles every day. We will cover the whole level in 12 days. In how many days will one-eighth of the surface be covered?

Final Answer:

d =  9

Step-by-step explanation:

2 d12 = 1/8  (d12) ln 2 = ln (1/8)  d=12+ln(1/8)/ln2=9



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