1) A chicken farmer has figured out that a hen and a half can lay an egg and a half in a day and a half (on average). How many hens does the farmer need to produce one dozen eggs in six days?
2) A chicken farmer also has some cows for a total of 30 animals, and the animals have 74 legs in all. How many chickens does the farmer have?
3)A scientist is experimenting with cubic bacteria that are one micrometer in length and that reproduce by dividing every minute into two distinct bacteria. At 12:00 p.m, he puts a single organism in a container. At precisely 1:00 p.m, the container is full. At what time was the container half full? How big (in Liters) was the container?
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