Please do question 2 involving analyzing air pollutants. COid Deminion Universit

Question

Please do question 2 involving analyzing air pollutants.

COid Deminion University [US http//www.blackboard.cdu.du/bbcowebdaw/pid-6331045-dt content-rid 201710 FALL CEE304 10495CEE 304 HW 2.pd #1 . #7, #IO. #11·#12 a. #13 a. #14a & b. 16, 17 #1 , #2, a4, 46, #7 L. Yo a sampling a gravity wastewater collection system to identify a peenol pollutac sourw. and folluw it upstrcam to the nest mnhole to cuntinue smpling. Again, you open the mamhola and there are three incoming pipe. urin yr invesrigatce a ya continue sampling upatresam, y is the chan lil you have followed ihe curri cl pn(h all 'he way back (01he inovming pipes, wh phenel source! 2. Yoa are couducting air sampling alon the Intestae 1-24. You are analyzing ) pollutuits Nitrogen Lxades NU Particulate Matter PMs Lead Carbon Monoxide CO n how many ways can you arrange the order the lets (first through sixth) for the aboratury? 3. Ona roadway expesion project, there are several areas where soal erasion is aconcem Theretore, you are examining different types of geotextile fabrics to prevent soil erosion and pronide stability conrol. Ln your macket reseuch, you have identified·15) different types of fabic for possible use. The chiet engineer bas now iucted you to select(7) ditfee ypes of fabnics for use on tis proiect. How many different sets of 7) can you choose since the order does no, matter? lype here to search ^

Explanation / Answer

For the testing laboratory, the question is asking in how many ways we can arrage the pollutants the polluants from first to sixth order.

As, there are six different pollunts. so there are 6 options from which one can be taken as first pollutant to test so that creates 6 possibilitiues. Similarly, for next slot there are 5 pollutants availalbe.

so Number of possibilites = 6 * 5 * 4 * 3 * 2 * 1 = 720

so, there are 720 ways by which we can test pollutants.

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