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There are seven girls on a bus. Each girl has seven backpacks. In each backpack, there are seven big cats.For every big cat, there are seven little cats. There is no bus driver. How many legs are in the bus?

An arrow is fired into the air with an initial velocity of 64 feet per second. The height in feet of the arrow t seconds after it was shot into the air is given by the function h(x)=-16t^2+64t. Find the maximum height of the arrow.

The sum of the square of 2 consecutive odd positive integers is 209. Find the integers.