A population of swans in a wildlife sanctuary is declining due to the presence of dangerous chemicals in the water. If the population of swans is experiencing exponential decay, and if there were 400 swans in the park at the beginning of the summer and 340 swans 30 days later,
(a) How many swans are in the park 60 days after the start of summer? 100 days after the start of summer?
(b) How long does it take for the population of swans to be cut in half? (This is known as the half-life of the population.)
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