The Math Forum is by far the best site that I've run into on the Internet. It deals with everything from
elementary school math to college level math. Math is like riding a bike. Once you've done it you can pick it up again easily. (Simply compute the
radius of the tires, and calculate the raidus of the pedal gear, and the length of the chain, and you'll get the answer to how many rpm's you need
to obtain a speed of 10mph.)
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