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Solved: Using the method followed in Example 17, express

Discrete Mathematics and Its Applications | 7th Edition | ISBN: 9780073383095 | Authors: Kenneth Rosen ISBN: 9780073383095 37

Solution for problem 40E Chapter 4.3

Discrete Mathematics and Its Applications | 7th Edition

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Discrete Mathematics and Its Applications | 7th Edition | ISBN: 9780073383095 | Authors: Kenneth Rosen

Discrete Mathematics and Its Applications | 7th Edition

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Problem 40E

Using the method followed in Example 17, express the greatest common divisor of each of these pairs of integers as a linear combination of these integers.a) 9, 11________________b) 33, 44________________c) 35, 78________________d) 21, 55________________e) 101, 203________________f) 124, 323________________g) 2002, 2339________________h) 3457, 4669________________i) 10001, 13422

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Chapter 10 Freshwater Resources and Water Pollution Hydrologic cycle​ :­ water continuously circulates through the environment. Ocean to atmosphere to land to ocean. The result: balance of the water resources in the ocean on the land, and in the atmosphere. Surface water:​ precipitation that remains on the surface of the land and does not seep down through the soil. ­ Found in streams, rivers, lakes, ponds, reservoirs, and wetlands Surface runoff:​ The movement of fresh­water from precipitation and snowmelt to rivers, lakes, wetlands, and oceans. ­ Precipitation from land Replenishes surface water Watershed/drainage basin:​ the area of land drained by a single river or stream. Range for a small stream to a huge portion. Groundwater​ : the supply of fresh water under Earth’s surface that is stored in underground aquifers. ­ Flows through permeable sediments or rocks slowly, covers several mililiters to a few meters per day. ­ Groundwater recharge is the process of downward movement and accumulation. Aquifer:​ groundwater deposit in the world, underground reservoir where groundwater is stored. Aquifer Depletion​ : occurs from excessive removal of groundwater. It lowers the water table (the upper surface of the saturated zone of groundwater) and causes subsidence (sinking of the land above the water reserve) Flooding​ : occurs when a river’s discharge cannot be contained within its normal channel. ­ Floodplain­ an area bordering a river channel that has the potential to flood Arid lands​: deserts..fragile ecosystems in which plant growth is limited by lack of precipitation Semiarid lands: receive more precipitation than deserts but are subject to frequent and prolonged droughts. Sustainable Water Pollution:​ the wise use of water resources,without harming the essential functioning of the hydrologic cycle or the ecosystems on which present and future human depend. Water table​ : the upper surface of the saturated zones of groundwater. Salinization:​ The gradual accumulation of salt in soil, often as a result of improper irrigation methods. Salt accumulates in the soil. Irrigation Effects​: improves the agricultural productivity of arid and semiarid lands, causes salt to accumulate in the soil (salinization), the irrigation water normally soaks into the soil and does not run off into rivers, Dams:​ generate water and ensure a year round supply of water in areas with seasonal precipitation. ­ Altering river ecosystems: heavy sediment deposition can occur in the reservoir behind the dam. ­ Water that passes over a dam doesnt have it’s normal sediment load ­ River floor downstream of the dam is scoured, producing a deep­cut channel that is a poor habitat for aquatic animals Columbia River​ :4th largest river in USA, more than 100 dams (19 major power generators), supplies municipal and industrial water to several major urban areas, ­ The dams affect fish life...impede salmon migration Chapter 11 the ocean and the Fisheries Ocean Life Zones The Intertidal Zones (between low and high tides) ­ High levels of light, nutrients, and oxygen make it a biologically productive zone ­ The stress of the constant wave attacks cause sand dwelling organisms to be active burrowers ­ Organisms lack adaptation to being out of water The Benthic Zone (ocean floor) ­ Sediments of sand or mud where bottom dwelling animals burrow ­ Deeper part of benthic divided into 3 zones (shallow to deepest) ­ The bathyal, the abyssal, and the hadal zones Coral. ­ Small soft bodied creatures similar to jellyfish and sea anemones ­ Live in calcium carbonate, that they produce using minerals dissolved in the water The Neritic Province (From shore to 200 Meters of Ocean water) The Oceanic Province (Most of the Ocean water)

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Chapter 4.3, Problem 40E is Solved
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Textbook: Discrete Mathematics and Its Applications
Edition: 7
Author: Kenneth Rosen
ISBN: 9780073383095

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Solved: Using the method followed in Example 17, express