00281nam a22001217a 4500008004100000020001800041041000800059080001300067082000800080100000700088101000800095245005600103210607b           ||||| |||| 00| 0 eng d  a9780321912763  aeng  23rda510  a510  a38  aMAT  aPrecalculus a Right Triangle  ApproachcJ. S. Ratti