วิชา PRE380

2. A chemical company is considering options for eliminating harmless chemical sludge from the following 2 options. (1) Prepare the site for landfilling in the factory. This option requires the initial investment for purchasing the essential equipment 130,000 Baht. Each year there will also be a cost of landfill operation 95,000 baht per year. At the end of its service life of 3 years, the equipment used within the landfill site will have a salvage value of 20,000 baht. (2) Hire a chemical sludge removal contractor to remove sludge. The contract term must be 6 years. The cost of contract to be paid to the contractor are 110,000 Baht a year in year 1-2; 115,000 Baht in year 3; 120,000 Baht in year 4; 125,000 Baht in year 5; and 130,000 Baht in year 6. a) (13 marks) If the company finances the money for this project by borrowing from a bank in which the bank charges interest on loans at the rate of 3.86% per 6 months, compounded every month. Which option should this chemical company choose? b) (5 marks) The company executives believe that the option of establishing a landfilling site within the factory seems to be a more sustainable alternative for the company. If the selection in question a) above did not select the landfilling site option, please suggest how much the initial investment for purchasing the equipment should cost so that the landfill option would be selected (assume the same salvage value of the equipment)?

Reading 3. Write the topic sentence of each body paragraph: Body Paragraph 1: ............................................................ อ่านต่อ

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es 4 Read the article. Underline the sentences in the present perfect tense. 1-02 UNIQUE HOBBIES NOTE ARCHERY What sports does your country perform well in at the Olympics? lys Vot My name is Mina, and I'm a competitive target archer. I have at the professional level for many years now, and I've even won a few tournaments su Target archery is a very popular sport, and it is particularly popular in my country. You could almost call it a national pastime for Koreans. There are even archery cafés in Korea! This might be why South Korea is known for producing some of the most talented archers in recent years. In fact, South Korean archers grabbed gold medals in all four categories of archery at the 2016 Rio Olympic Games. The rules of target archery are simple. Archers shoot at a stationary target. Indoor competitions take place at 18m. Outdoor ranges can be from 25m to 90m. Each match is divided by ends which are counted as either three or six arrows. Archers shoot their arrows at a target with ten rings drawn on it. Each ring's value gets higher as it nears the center. After firing all shots, archers add up their scores and the archer with the most points at the end of the competition wins. GEOCACHING Hello, I'm Andrew and I have been an active geocacher for more than ten years. Geocaching is an activity for people who love exploration and adventure. It's essentially a giant game that involves using Global Positioning System (GPS) receivers to search for hidden treasures called geocaches. There are all kinds of geocaches. Some are very simple to find and others require the participant to solve puzzles to learn the cache's location. What waits inside each cache is a mystery. Geocaches can contain all sorts of different treasures, such as CDs, books, USBS, and even money. One common item in almost every geocache is a logbook. The logbook is a record of all the participants who have found the cache and contributed to it. 1 If you're interested in seeing what treasures lie out there, you can try this activity out yourself. Look online for nearby geocaches. There may be some nearby. Find one and then set off on your first geocaching adventure. All you need is a smartphone and a little bit of time to join in the fun. NOTE Go online and try to locate a geocache near you. Who do you think placed it there? Comprehension 5 Circle true or false. true 1. South Korean archers performed poorly at the Rio Olympics. 2. Outdoor target archery ranges can be over 90 meters long. true true 3. Andrew has been a geocacher since he was ten years old. 4. Geocaches usually contain a logbook for people to sign. 5. You can find geocache locations online. true true Answer the questions. 1. What are the rules of target archery? 2. What are some things that can be found inside of a geocache? 3. What equipment do you need to search for geocaches? Talk with a partner. 1. What are some unique hobbies? 2. What is the most unique activity or hobby you've ever tried? What was fun or not fun about it? 2 What are some common pastimes in your country? false false false false false 12 27 28 29 30 11 R

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จิ1 56% ต14:07 Laz Exercise 2 Read the text and mark the sentences T(true) or F (false) ASEAN corner 4 Popular sport in Southeast Asia othr withoul ethng the b. Fall on the ground There cle twe 6ms k Taคraw 5 ต0 wiกกเกg point in this g.me but the aim s to hoน h2w wะ. the playr Can plry and how crealivwe the ayr 5 hor coกg up with diererl styles to A.ck thee try to mม ๕ nกะกนกก.bie The p s an e ther cho and hod to touch the al bน they ame from Howrver, ts existonce in many ASEAN Cnnot เe ther hands The 9มกe 5 thre s and countries shows thal our counties have had a lon0 ach et has 1 poinds. The eam that wากs teo ou of relationship before the formation of ASEAN community thre ets 5 the กก Nowadays, Sepak. Takraw has become an international Sport. thas beก inciuded in many internalional Sports กa team with arattan bal Playกg alone, the player vants Such as the Asian Games and SEA Cames in Myanmar. pecple can play Chinlone alone or แสดงความคิดเห็น คอร์สคณิตาออนไลน์ สรุปเคล็ดลับ ปิด อ่านเพิ่มแตะทีน! กระชับ เข้าใจง่าย พิเศษเผู้ใช้LEAR สด10% ควรส

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จิ1 56% ต14:07 Laz Exercise 2 Read the text and mark the sentences T(true) or F (false) ASEAN corner 4 Popular sport in Southeast Asia othr withoul ethng the b. Fall on the ground There cle twe 6ms k Taคraw 5 ต0 wiกกเกg point in this g.me but the aim s to hoน h2w wะ. the playr Can plry and how crealivwe the ayr 5 hor coกg up with diererl styles to A.ck thee try to mม ๕ nกะกนกก.bie The p s an e ther cho and hod to touch the al bน they ame from Howrver, ts existonce in many ASEAN Cnnot เe ther hands The 9มกe 5 thre s and countries shows thal our counties have had a lon0 ach et has 1 poinds. The eam that wากs teo ou of relationship before the formation of ASEAN community thre ets 5 the กก Nowadays, Sepak. Takraw has become an international Sport. thas beก inciuded in many internalional Sports กa team with arattan bal Playกg alone, the player vants Such as the Asian Games and SEA Cames in Myanmar. pecple can play Chinlone alone or แสดงความคิดเห็น คอร์สคณิตาออนไลน์ สรุปเคล็ดลับ ปิด อ่านเพิ่มแตะทีน! กระชับ เข้าใจง่าย พิเศษเผู้ใช้LEAR สด10% ควรส

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Exercise 1 Choose the correct relative pronoun. 1 The car who(Which){s Outside our house is my uncle's. 2 Mr. Smith, who/which is teacher, comes from Scotland. 3 That's the boy who/why house is next to ours, 4. The man who/which just left is my uncle, 5 The car who/which knocked down a pedestrian was driven by a woman. 6. Where is the cheese when/which was in the fridge? 7. The man who/which is sitting by the door takes a break. 8. The flowers when/which my boyfriend gave me have died. 9. She is the girl who/why I saw at the party last night. 10.We are using books who/which were printed last year.

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@ Transactions of Mr.Bos service during January 25X8 as follows: 119 Mr.Bos open shop cars rental service, by tO cash 40,000 babt Deposit Account 80,000 baht, equipment 50,000 baht, cars 800,000 25X8 Jan 1 baht and payable-Keng service 120,000 baht investment. 4 Receive cash from revenue from rentcar 40,000 baht. Paidrepair from services car 6,000 baht. Send a bill payment to car rent receivable who rent a car 12,000 baht. 8 10 15 Receive bill the repair from payable-Keng service 4000 baht. 20 Mr.Bos withdraw to a private 15,000 baht. 22 Receive money from receivable on 10th all. 25 Payments for all payable-Keng service. 26 Receive a rent car of cash 25,000 baht. 30 Purchase a computer 22,500 baht. 31 Paid utilities, amount of 4,500 baht. 31 Paid Salaries for employees 35,000 baht. Command Recordingin the General Journal General Journal Page 1 Year 25X8 Debit Credit No. Transaction Month|Date |Account Baht |St. Baht |St. ที่

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VOCABULARY DEVELOPMENT Word-building (2) 1 Look at the words from Unit 5. Use a dictionary to identify what part of speech each word is. STUDY SKILแL Suffixes Identify the part of speech of a word (verb, noun, adjective, or adverb) to help you understand the meaning and develop your vocabulary, for example: inform (v), information (n) informal (adj), infoirmally (adv) forget greatly invitation international renewable criticism really enjoy 2 Complete the table for each word with one example of each part of speech. Mark the stressed syllable. Use your dictionary to help. Read STUDY SKILL Suffixes give you clues to the part of speech, for example: " -tion, -ism, ment, ity, ness are noun suffixes, for example, invitation " -al, -ful, -able are adjective suffixes, for example, jnternational " -ly is an adverb suffix, for example. formally verb adjective adverb noun think hopefuly pain pleasure critical 3 Read STUDY SKILแ Match meanings 1-10 with prefixes a-j. STUDY SKILแ Prefixes Use the example words in italics to help. a auto- autobiography antiseptic bilingual d micro- microphone misprint f multi- multimedia Adding aprefix changes the meaning of a word. Each prefix has a different meaning and can be found as a separate entry in the dictionary. For example: mis- means wrong or not e.g. misunderstand. bi- means two or twice, e.g. biannual (twice a year). 1 against 2 wrong: not b anti- 3 | small/tiny ( bi- 4 |after | two/twice under 5 e mis- 6 across; change again 9 8 post- postgraduate h re- 7 8 review | by itself/oneself i sub- submarine 10 many j trans- transform 4 Complete definitions 1-10 with an example word from exercise 3. is to change something completely. is a piece of electrical equipment that is used for making sounds and 1 To 2 A voices louder. 3 Someone who is can speak two languages equally welL. 4 A liquid or cream which stops a cut becoming infected is called an 5 A type of ship which can travel underwater is a 6 To your work is to look at it again to make sure you understand. 7 An is the story of a person's life written by that person. 8 A is someone doing further studies at a university after his or her first degree. 9 is using sound, pictures, and film as well as text on a screen. 10 A is a mistake in printing or typing. 32 Unit 5 - Conferences and visits

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existence, which is to say he moved constantly, never staying long enough Af that time, Uncle Roger was experimenting with a peripatetic to have an official address. 3. The word peripatetic in this sentence means a. experimenting b. moved constantly C. an official address d. a stationary population If seems to me that philatelu, which is not only the collection of stamps but also their detailed study, is unfairly ridiculed in the media as a hobbน for wimps. 4. The Word philatelน in this sentence meanร a. the media b. a hobby for wimps C. the collection of stampร d. study the detail of stamp AT the colloquน, which is a fancy name for 9 conference, I had a chance เ0 meet with several profeรรors and find out about their universities. 5. The Word colloquน in this sentence means 0. the commนnity situation b. find out about their universities C. 0 fancy name for a conference d. 0 chance to meet with several professors 16 ฟoy Leaming Technique Exeros