*4.8.21

Mathematics

1 answer:

pickupchik [31]3 years ago

5 0

Answer:

19.9 days

Step-by-step explanation:

The amount remaining after d days is ...

a = (1/2)^(d/7)

We want to find d when a = 0.14

log(a) = (d/7)log(1/2)

d = 7·log(0.14)/log(1/2) ≈ 19.855 ≈ 19.9

The farmers need to wait about 19.9 days for it to be safe.

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