赤く丸をしたbの問題で解答の方に二階微分した後の式がなぜ(-1/4)(-1/4)(H-27)になるのか分かりません。教えてください🙇‍♀️

QA At time t = 0, a boiled potato is taken from a pot on a stove and left to cool in a kitchen. The internal temperature of the potato is 91 degrees Celsius (°C) at time t = 0, and the internal temperature of the potato is greater than 27°C for all times t > 0. The internal temperature of the potato at time t minutes can be modeled by the function H that satisfies the differential equation dH (H- (H-27), where H(t) is dt measured in degrees Celsius and H(0) = 91. (a) Write an equation for the line tangent to the graph of Hat t = 0. Use this equation to approximate the internal temperature of the potato at time t = 3. (b) Use 2017 APⓇ CALCULUS AB FREE-RESPONSE QUESTIONS (a) dH d²H dt² to determine whether your answer in part (a) is an underestimate or an overestimate of the internal temperature of the potato at time t = 3. (c) For t < 10, an alternate model for the internal temperature of the potato at time 7 minutes is the function -= − (G - 27)²/3, where G(t) is measured in degrees Celsius dG G that satisfies the differential equation dt and G(0) = 91. Find an expression for G(t). Based on this model, what is the internal temperature of the potato at time t = 3 ? 564 at (21-27) - == 2-16 To = - = (H(3)-27) 4 -64 = HB)-27 -37 = H (3) (b) _d²fi © 2017 The College Board. Visit the College Board on the Web: www.collegeboard.org. GO ON TO THE NEXT P

(A)の問題の(1)~(6)までの答えと訂正した回答を教えてほしいです。よろしくお願いします。

【4】 次の設問 (A), (B) に答えよ。 (配点 30> (A) 次の(1)~(6) の各英文には、下線部ア~エのいずれか1つに文法・語法に関して不 適切な あるいは文意を通らなくする箇所が含まれている｡ その下線部の記号を記せ。 ア (1) It is estimated that the surface temperature of our planet has been risen by about half a degree Celsius, compared to a hundred years ago, and some scientists believe it's going to get warmer yet in the years to come. (2) In English-speaking cultures, children are often told to say "please" when asking for something. By so doing, they are more likely to be given イ permission than they do not. If they don't, their parents give them a hint, by asking them " What's the magic word?" Trying to forecast weather is incredibly complicated. Some scientists P believe that no matter how advanced science is, weather is impossible to イ predict it accurately, because there are too many random elements involved. (3) Inuits are a related group found in Alaska, and also in Canada and Greenland. They are thought to have spread into North America from Siberia many thousands years ago. In both the US and Britain these people are ウ often called Eskimos but the name Inuit is now preferred and is becoming more widely used. 5) The Cold War is a term for the political conflict between the capitalis countries of the West and the Communist countries of the East that begar 7 after World War II. Both sides had large military forces which were kep イ ready for war, and threatened at each other with nuclear weapons. I

この回答分からないので教えてくれる方いますか、

Calculate the value of entropy of 1.00 mol of vaper (water in gas state) at 120 °C and 1 bar, and that of 1.00 mol of ice (water in solid state) at -20 °C and 1 bar, respectively. Here Cpm (H₂O, g) = 33.6 J K-¹mol-¹ and the all values of heat capacity at constant pressure of water are independent of temperature. (6) 12.

第7段落の下線部ですが、訳の意味がわかりません。わかる方教えてください！！

as ys 5 6 One day, a college professor named Denis Osborne came to lecture on physics, giving Mpemba an opportunity to talk to an expert on the subject. He repeated his question, but this time he got a quite different reaction. The professor first smiled and asked, “Is it true? Have you done it?" After Mpemba la horruitnos ewenibaa admon M answered "Yes," the professor said, "I do not know, but I promise to try this experiment when I am back at my college." 7 Professor Osborne kept his word and carried out the experiment himself. He found that for temperatures up to 20°C, the time was roughly proportional to the temperature above freezing, up to a maximum of 100 minutes at 20°C. For higher temperatures, however, the time dropped dramatically, down to 40 15 minutes for water at 80°C. le 10► 700

答えと、どう間違ってるのかを教えて欲しいです😭😭😭😭 問題は下線部の内間違えている部分を選べです

1) [ 1 ] Coastal and inland waters, such as Tokyo Bay, Dare inhabited not only by fish but also by such sea 3creature as shrimp and clams, and so play an important role in the ecology of both land and sea. 2) [ 2 ] If the ozone gases of the atmosphere did not filter out the ultraviolet rays of the sun, life 2as we know it would not have evolved on earth. 3) [ 3 ] DA calorie is the quantity of heat required to rise the temperature of a gram of water by 1°C Dat one atmospheric pressure. 4) [4] The most important period of Ophysical growth in humans 3take place during their first two years. 5) [5] Biochemists Dhave solved 2many of the mysteries about photosynthesis, which the process plants 5make food.

頭が疲れました。これ証明してください。

10. Make a conjecture about the temperature on November 1 in Hay River, Northwest Territories, based on the information in the chart below. Summarize the evidence that supports your conjecture. Year Maximum Temperature (°C) 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 -1.1 -10.1 -1.6 -3.9 -3.2 +2.9 +1.8 -3.0 +3.1 -2.2 le in on

漸近線を求める問題です、お願いします

8. The temperature, 0°C, of a cup of tea / minutes after it was placed on a table in a room, is modelled by the equation 0 = 18 +65e s Find, according to the n. el, (a) the temperature of the cup .. 18⁰ ℃ (1) (b) the value of 1, to one decimal place, when the temperature of the cup of tea was 35 °C. 35 = 18+ 65ē 7/8 -t/8 (3) ⇒19=65€ 7/65 lu (17/4)= -4/8 (c) Explain why, according to this model, the temperature of the cup of tea could not fall to 15 °C. HA (0,94) 720 N = A + Re en it was placed on the taki (8,50) 1>0 μ= A + Be 8 04-1 Figure 2 The temperature, μ °C, of a second cup of tea t minutes after it was placed on a table in a different room, is modelled by the equation Laverage the room temp 0 -18 where A and B are constants. Figure 2 shows a sketch of u against / with two data points that lie on the curve. The line 1, also shown on Figure 2, is the asymptote to the curve. Using the equation of this model and the information given in Figure 2 (find an equation for the asymptote /. -trg t>0 is 24°C 04 142 (1) 4:10.7² DO NOT WRITER €

未来形についてです。 解説お願いします。

FUTURE FORMS 5 Match the future forms with the writer's purpose. 1 Are you going to the rubbish tip? I'll go with you. Cobur? 2 Satoshi is going to give a presentation about global warming.e 3 On Thursday, leaders are meeting to discuss climate change. 4 Some scientists say sea levels will rise in the next ten years.b YRATURA 5 The four warmest years have occurred since 2014. Scientists think temperatures are going to continue to increase. a fixed arrangement for the future vabimud ab soqqalb dulonso omosedus b prediction about the future c decision made at the time of speaking d future event when there is evidence e decision made before speaking abssd own thiw slane ciertvinu deinn 1. sila ten

答えが分かりません。教えてください🙏 Part1～3の内容をふまえて英語で答える問題です。 自分の回答 1・It is ground and processed into bread , toltillas,or cornflakes. 2・Because the left... 続きを読む

1 Part 世界の人々は日々の食事に何を食べているのでしょう。 1 Each country has its own staple food, a food which is commonly eaten every day. Staple foods provide carbohydrates, which are our energy source. The major staple foods are rice, wheat, corn and some root vegetables. Rice is eaten mainly in Asia, boiled, steamed, or sometimes made into noodles. Wheat is eaten in Europe and North America. It is usually ground into flour and made into bread or pasta. Corn has been a staple food for people in South America. It is ground and processed into bread, tortillas, or cornflakes. The most common root vegetables are potatoes. They are eaten as a staple food in various areas from South America to Europe. Yams or taro are also eaten widely in Africa, in tropical areas in Asia and in the Pacific. Root vegetables are usually steamed s or boiled, and sometimes mashed before being served. 2 Though we eat staple foods for every meal, they are not necessarily the main part of our diet. * be made into ~ ataple food Lesson 2 Food Culture Phrase Reading Part 2 Part2. 3 Nowadays/about 40 percent of the 今日、世界の約40パーセントの人々が食べ物を people in the world eat food/ 食べます 日常的に手で。 with their hands regularly// Most of them are in Africa, / その内のほとんどの人々はアフリカにいます in the Middle East and in some parts of 中東やアジアの一部に。 Asia.// They believe hands are cleaner than other 彼らは他の器具よりも手の方が清潔だと考えて utensils./ います。 which can be used by someone else. // それは他の誰かに使われたかもしれない。 When you eat with your hands,/ 自分の手で食べるとき, you can feel the texture and temperature 食べ物の感触や温度を感じることができます そしてそれは食べ物をよりおいしく味わわせます。 of food/and it makes food taste better. // In some regions./ 地域によっては, however, / しかし, the left hand is never used / 左手は絶対に使われることはありません because it is considered to be unclean. // なぜならそれは不潔だと考えられているから。 4 Another 30 percent of the people in the 世界の別の30パーセントの人々は、主に東アジ world, /mainly in East Asia, / アの (人々), use chopsticks.// 箸を使います。 They are useful for eating sticky or hot それらはべたべたする食べ物や熱い食べ物を食 food.// べるときに便利です。 They can also cut food into smaller それらはまた食べ物を小さく切り分けたりもで きます。 pieces, / mix ingredients before eating,/ 食べる前に素材をかき混ぜたり、 口の中に食べ物を運んだり。 and carry food into the mouth.// Which do you think is better to use, / hands or chopsticks?// あなたはどちらを使うのがよいと思いますか. 手と箸では。 staple common carbohya source com k root veg bolled steamed North Am pasta ca South Ana stuff a processic p tortillia(s) kat comiaio kirafiki yam (5) Ju taro mashed Imaju necessarly

答えがなくて分かりません。教えてください🙇‍♀️

Part 2 どのように食べるかは地域や文化によって異なります。 requ 3 Nowadays, about 40 percent of the people in the Mide (mid ute lju: tex (tek world eat food with their hands regularly. Most of them are in Africa, in the Middle East and in some parts of Asia. They believe hands are cleaner than other utensils, which can be used by someone else. s When you eat with your hands, you can feel the texture and temperature of food and it makes food taste better. In some regions, however, the left hand is never used because it is considered to be unclean.uth re [ri: ur [A 4 Another 30 percent of the people in the world, 10 E mainly in East Asia, use [i chopsticks. They are useful C [t for eating sticky or hot food. They can also cut food into smaller pieces, mix ingredients before eating, and S carry food into the mouth. Which do you think is better to use, hands or chopsticks? 15 hands