TADM2E 1.21

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1 million seconds = 277.777778 hours

1 million seconds = 11.5740741 days



Possible approach:

a) There are 3600s in an hour
b) Eliminating the thousands, we get 1000 / 3.6
c) 3.6 is about half-way between 3 and 4, thus the result is about (1000/3 + 1000/4)/2 ≈  (333+250) = 583/2 ≈ 290
d) About 12 days (240 + 48)

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