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數學 高中

求救第55題 完全看不懂他要我幹嘛

Year slenue Req) = 1932 1958 +1000 q R 9)=-1000q =74 1963 1968 COM If the price in dollars of a stereo system is given by 1000 p(q) + 1000, 1000 ² q where q represents the demand for the product, find the mar- ginal revenue when the demand is 10. 54. Profit Suppose that for the situation in Exercise 53 the cost in dollars of producing a stereo systems is given by C(q) = 0.2q2 + 69 + 50. Find the marginal profit when the demand is 10. 59. Marginal Product of Labor The output y of a manufacturing y process is a function of the size of the labor force n using the function 1990 +1000 1971 1974 = 990 197 197 19 19 1 y = kVn. The marginal product of labor, defined as dy/dn, measures the rate that output increases with the size of the labor force, and is a measure of labor productivity. (a) Show that (c) Using the a cubic f respond the rate and 200 (d) Discus descri part ( the y (e) Exp data calc ful x C(x) = 58. Money 1955-7 dy k dn an (b) How can you tell from your answer to part (a) that as the size of the labor force increases, the marginal product of labor gets smaller? This is a phenomenon known as the law of diminishing returns, discussed more in the next chapter. 56. Profit An analyst has found that a company's costs and rev- enues in dollars for a product are given by x2 C and R(x) 2x 2 5000' respectively, where x is the number of items produced. (a) Find the marginal cost function. (b) Find the marginal revenue function. (c) Using the fact that profit is the difference between revenue and costs, find the marginal profit function. (d) What value of x makes the marginal profit equal O? (e) Find the profit when the marginal profit is 0. (As we shall see in the next chapter, this process is used to find marimum profit.) A wher in bi find year (a) (C) (e) nad since

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英文 高中

請問39的D選項哪裡錯 在左附圖的文章中 最後一行最後一句有提到D選項 再請問hold back on在D選項是指堅持嗎 還是有其他意思 謝謝

合題答對者,得2分。 第36至39題為題組 & Thi race to 9-673 +3 Life is all about the choices we make, and they affect everything we do and feel. Kids reporter sad?” of the reseai offici New lack 4 || or SOT daydream about the coolest toys, and parents seek out the best schools for their children. Some people want the tastiest food, while others desire the biggest return on their investments Before we make any final decisions, we are given a lot of choices to sort through? Most of us feel that the more choices we have, the happier we'll be, as we'll be better able to determine which is best for us. At least, that's what we used to think. Research now shows us that there is such a thing as having too many choices, and it's actually making us miserable.' In fact, an excess of choices can lead to dissatisfaction, depression, anxiety, self-blame, and 'fegret. This is because it paralyzes us and forces us to make decisions that go against our best interest. What's more, it results in a huge waste of time. American psychologist Barry Schwartz lays this all out in his book, The Paradox of Choice. He sheds light on the process by which we become less satisfied, which is the cost of having too many options. First, once we've made our pick, we imagine how we could have done better. This then nags at us, making us regret our imperfect decision Soon, we convince ourselves that the discarded options or even imaginary alternatives would have been better than what we settled on, which causes expectations to rise. We're not completely satisfied with the outcome of our decision, even if it's a good one. In the end, we are no longer able to experience pleasant surprises. Fortunately, Schwartz says this can be turned around. But we must first embrace our limitations by 29 Yowering our expectations, being grateful for what we have, and not comparing ourselves to others, vic ti r t ~New 必勝卷第18回試題-4~

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英文 高中

請問50.題的 B選項 文章中有表明說intend to be temporary 嗎? D選項的rare and beautiful 為什麼有錯 ? 謝謝😀

You may or may not have heard of Christo, but it's undeniable that he had a big impact on the art world. The Bulgarian-American artist, who passed away in May 2020, made a career out of combining art with engineering to produce sweeping, grand installations. Christo was born in Bulgaria but left with his family to take up residence first in Western Europe and then in the US. He became known as a "land artist)” someone who creates works of art not by painting existing landscapes, but by adding his or hey art to the landscapes themselves. In 1969, he created Wrapped Coast in Sydney, Australia. Working with a team of assistants, he took over part of the coastline (at Little Bay in Sydney and covered the entire area in a huge spread of synthetic fabric. The fabrie tovering the landscape encouraged people to see the area with a hew perspective. In addition, the way the fabric hid the ground while still revealing its bumps, fissures, and curves turned it into a landscape in the most essential sense, like a three-dimensional topographical map of itself. At the time, it was the biggest piece of artwork ever created. Christo continued to think big with Valley Curtain, another enormous piece of fabric pulled across a valley in Colorado, US, from one side to the other. More than 350 meters (m) wide and 100m tall, the curtain's construction was a lengthy and laborious process. During his first attempt to set it up, the fabric caught too much wind and blew away. When it was finally put into place, it lasted only a little more than a day before having to be dismantled again. Though Christo's artwork, like anything in life, did not last forever, it was extraordinarily impressive while it existed. Christo continued to create such pieces throughout his career. 000.000 A 48. Based on the passage, a land artist needs der er (A) personal experience as a construction engineer 000.000.1 Bt considerable knowledge about geography (C) the right landscape to create their pieces 000,008 the ability to create long-lasting pieces Der 000.000 49. What is said about Valley Curtain? (A) Christo's first attempt at it was a failure. (B) Christo used a fabric to cover an entire ground. (C) It covered the entire length of a long valley! (D) It used a three-dimensional topographical map. 50. What do we learn about Christo's artwork from the passage? (A) It was inspired by something he saw as a small child. 10 . (C) It made people think about environmental protection. (D) It showed people that art was rare and beautiful. D 51. Which of these pictures is most likely Christo's artwork? (A) (B) (C)

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數學 高中

根本看不懂啦\( ̄▽ ̄;)/

Your report should follow these guidelines, although you may choose how you present it: How to Write a Mathematics Report In writing your report, remember that you are writing up a mathematical story and so, like all good stories, it will need a beginning, a middle and an end. More formally, the main components of this writing style are: Introduction, Formulating the Problem, Solving the problem, Discussion of Results, and Conclusion. We will now consider some of the detail in each of these aspects. Introduction This is the beginning of the story. Give a brief explanation of what the problem is about what the goals of the report are and what will be presented. Assume that your reader does not know what the problem is about or how to solve it. Formulating the problem Translate the situation into a maths problem. Explain how you will begin to solve the problem and break it into simpler stages. Discuss any assumptions made. What quantities are variables and which values are fixed? You may use sub-headings if they assist you. Solving the Problem Show any calculations and mathematical reasoning that you use. (Assume that your reader does not know much maths). Do not show the same types of calculations repetitively. Just give one or two examples of a calculation and then put the rest of the results in a table. Use diagrams or graphs if they assist you. Make general remarks about what you observe in your calculation results and, possibly, why. You may want to criticise your work and go on to improve it in the next section. Explain what you will do next and why. Discussion of Results - Evaluate and Verify Summarise your results if necessary and refer to your mathematical reasoning. Justify procedures used. Interpret your results. First, are they reasonable or does something not look right and need further investigation or checking? Is there a decision to be made? Here is where you should present the decision-making process. Evaluate the strengths and limitations of your solutions. Conclusion Summarise your findings. Refer to the problem outlined in the introduction. Make sure that you answer the question that was asked. Make recommendations. No new material should be presented here.

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英文 高中

求解第5,6,9題

1atloh he needs yaga ig to 了he new technology 。 clally the younger generai timeo 了2ss074 2 讓 。We i Be 人上 ust use our time more efficiently。。Indeed, we aSKIng, 1._, theart of doing several things at atime, 2. the Internet for some Then he may begin 蟬 3 music playing all the time on his MP3 交/說 player. Juultitasking has become _4. than usual. More and more people, 人 ton, are_ dividing their attention between many tasks 5 at the ps experts Wondering whether multitasking is a good habit.。Obviously, one ame he has finished downloadin lvani包8 計量生 0 网 ee doing daily tasks more_efficient。 But there are some Sed multitasking.。For instance, it can reduce the quality and _7了0f he S Teasonlng, and thus a person might lose the ability to think over a problem or do creative Work Desides, multitasking gadgets can affect our Telationships With others, as they enable us to _8._ into ourT own individual worlds。 In fact, 緞 has been a heated discussion about the pros and cons 0{ multitasking。 Truly, we can enjoy increased speed and efficiency, _10. we may become distracted and even neglect our Telationships with those around us.”Hence, it is necessary for us to adopt the golden means between the two extremes. ( ) 1. (A)that 1s (B) at least (C) by chance (D) such as ( 0 Surfs (B) surfed (C) surfing (D)to surf ( 放 ) 3. (A) at (B) with (C) from (D) through ( 00劑 (A) extensive (B) as extensive (C) more extensive”(D) the most extensive ( 巷) 5. (A) performed (B)performing (C)perform (D) toperform ( 全) 6. (A) lets ttR) has (C) gets 品志和路? 0 ) 呈2 disguise (B) depth (C) theory (D) stilness ( > ) A) emerge (B) entertaln (C) retreat (D) 以 ( 病) 9. (A) 1t (B) there (C) that (D)this 人 ) 10. (A) then (B) so (C) and (D)but 七、辣讀測驗 As the exams are around the corner, students often feel hard pressed for time and multitaSK more 4 生0 especi引 nd more because they consider multitasking an effective_way to manage time Well ver, is it possible that human brains can do parallel processing if it requires conscious thoughi y when the different things contain different goals? 8 itasking, a term which originated in the computer engineering industry 88 describe : 共計旋k0g g - 由 和

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