Answer
A table shows the population after a set number of days.
$y=60*2^x$
After day 6.381 (or on day 7), there will be more than 5000 hydra.
Work Step by Step
$5000 = 60*2^x$
$5000/60 = 60*2^x/60$
$83.33 = 2^x$
$6.381 = x$
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