Heather's water heater needs repair.The plumber says it will cost $300 to fix the unit,which currently costs $75 per year to operate.Or Heather could buy a new water heater for $500,including installation and the new heated would save 60% on annual o

来源：学生作业帮助网 编辑：六六作业网 时间：2024/11/25 09:50:39
Heather''swaterheaterneedsrepair.Theplumbersaysitwillcost$300tofixtheunit,whichcurrentlycosts$75perye

Heather's water heater needs repair.The plumber says it will cost $300 to fix the unit,which currently costs $75 per year to operate.Or Heather could buy a new water heater for $500,including installation and the new heated would save 60% on annual o
Heather's water heater needs repair.The plumber says it will cost $300 to fix the unit,which currently costs $75 per year to operate.Or Heather could buy a new water heater for $500,including installation and the new heated would save 60% on annual opearating costs.How long would it take for the new unit to pay for itself?

Heather's water heater needs repair.The plumber says it will cost $300 to fix the unit,which currently costs $75 per year to operate.Or Heather could buy a new water heater for $500,including installation and the new heated would save 60% on annual o
Assume it takes n years:
In the case of having it repaired, in n years, the total cost would be: 300 + 75n dollars
In the case of buying a new one, in n years, the total cost would be: 500 + 75(1-60%)n dollars
300 + 75n = 500 + 75(1-60%)n
n = 40/9
If you have to use an integer for n, n would be 5 (the smallest integer greater than 40/9)

希瑟的热水器需要修复。 水管工说，它将耗资300元修复单位，目前成本75元，每年运作。 或希瑟500元可以买一个新的热水器，包括安装和新的加热年度opearating成本节省60。 新单位的需要多久来支付本身？
不会！

water-to-refrigerant heat exchangers Heather's water heater needs repair.The plumber says it will cost $300 to fix the unit,which currently costs $75 per year to operate.Or Heather could buy a new water heater for $500,including installation and the new heated would save 60% on annual o 麻烦大家翻译一段英语,谢谢了HEATHER KINKADE-LEVARIO’S passion for rainwater harvesting began as a way to create a sustainable component for commercial developments that were lacking in any such elements. She has worked with water collec The heat is absorbed__ the water Oatmeal Heather boil sea water with high heat还是boil sea water by high heat? heat When(),ice becomes water heating is heated heated to heat is energy A heat B water C Air 英语翻译：to mordant with alum heat 4 gallons of water. Water ＿＿(boil)if it ＿＿(heat). what is the latent heat for water vaporization you should heat the water ,or it will--------.(frozen) the heat of sun's raies意思? Sometimes,the simplest ideas are the best.For example,to absorb heat from the sun to heat water, If you (heat) the ice,it becomes water soon 请在空中填出heat的适当形式, -----------------,water changes into vapor. a When heated b To heat c Heat d Heating 选哪个 为什么 Water's Edge 歌词