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数学 高校生

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

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英語 高校生

この答え持ってらっしゃる方いらっしゃいませんか。

Review for Lesson 1 A: Check Read the passage and answer the questions below. What kind of qualities do you think a "leader" has? You might imagine a strong, confident person [gives directions to other people. However, such a one-way style of leadership has become less common. These days, thanks to the Internet, you can easily voice your opinions. This has resulted in more cooperative decision-making. G [3]. These skills focus on empowering all members, improving communication, and enhancing teamwork. Successful 21st century leaders bring people together by respecting all members' opinions. They lead through collaboration, not by control. Today, the world is changing at an incredible pace. To tackle ongoing global challenges, it is helpful to learn about the importance of leadership. By developing leadership skills, you can improve your community, your school life, and yourself. Hind say (1) Fill in the blank by choosing from the words below. [ which who / whom / what ] (2) What does 2 refer to? Answer in Japanese. (3) Put the words below in the correct order to fill in blank 3. [ to use a cooperative / "soft skills" / team / modern leaders / build 1. (4) Translate 4 into Japanese. (5) According to the passage, which of the following sentences is true? a) Soft skills are becoming popular among one-way style leaders. b) Today's leaders use soft skills to encourage others to communicate. c) The world is changing so hat soft skills are not useful. (6) If you develop leadership skills, what can you do? Answer in English. 6 Lesson 1

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TOEIC・英語 大学生・専門学校生・社会人

8番ですが、本文の内容に合っているか合っていないか、どちらにもとれそうで迷っています。 教えていただきたいです。

20 D 007 feel guilty about eating so much. People tease me for being fat and I pretend it Hello Sarah) I've put on a lot of weight recently. I make myself sick when I doesn't bother me, but I cry myself to sleep. My family says nasty things about my size, too. Please help me lose weight. 5 15歳の女の子の悩みの相 Barbara, 15 Sarah says: Hello, Barbara. Please try to stop making yourself sick. Beauty comes from within and in all shapes and sizes. The main thing is to be healthy. This can be done through your diet and by exercising. (It's unkind of your family to tease but pl" t ↳ To Tease 10 maybe they don't know that it upsets you So tell them how you feel. Ask your mom to help you follow a healthy, low-fat diet. Cut back on potato chips, cakes and sweets. Why not take up swimming or jogging? By eating healthily and exercising, your body will naturally reach a healthy weight. Don't skip meals, go on a crash diet, or make yourself sick. You may damage your body 15 if it doesn't receive the right nutrients. If you can't talk to your mom, your doctor will help. If you are unable to stop making yourself sick, call the Eating Disorder Association Helpline. Eating Disorder Association Helpline 01603765 050 Monday-Friday, between 4 p.m. and 6 p.m. Email: eda@netcom.co.uk

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英語 高校生

この問題教えてください

50 内の語を適切な形に変えて、 空所に入れましょう。 (1) I visited a temple (2) Who is the woman in 1224. (build) the kids? (watch) in English. (3) My sister can read books (4) I know the boy 6 次の日本語に合うように,空所に適切な語を入れましょう。 (1) 私はソフィーに窓を開けるように頼みました。mog I Sophie (2) 私はあなたに彼がどこにいるか教えてもらいたい。 I you (3) 先生は私たちにその本を読むように言いました。 My teacher the book. (4) ジャックに今晩私に電話をするように頼んでもらえますか。 Will you Jack me tonight? (write) a red T-shirt. (wear) us open the window. tell me where he is. 7 次の文を []内の指示に従って書きかえましょう。 (1) I meet her at the station. [文末に tomorrow を加えて] I her at the station tomorrow. (2) They were running along the street at the time. Jack news since this morning. [at the time を now にかえて] [「今朝からずっと・・・し続けている」という文に for the 5 名詞を後ろから説明する分詞 分詞がほかの語を伴って直前の 名詞を説明する。 ●現在分詞 「・・・している~」 Look at the girl singing a song. (歌を歌っている→ 女の子) ●過去分詞 「・・・された〜」 I have a watch made in Japan. (日本で作られた→腕時計) 6 to 不定詞を含む表現 ● ask ... to ~ 「…..に~するように頼む」 I asked my mother to buy the hat. (私は母にその帽子を買ってく れるように頼みました。) ●want ... to ~ 「・・・に~してもらいたい」 I want you to carry these bags. (私はあなたにこれらのかばん を運んでほしい。) ●tell... to~ 「...に~するように言う」 He told me to study harder. (彼は私にもっと一生懸命に勉 強するように言いました。) 7 動詞の形と「時」の関係 ●現在形 過去形 / 未来の形 talk(s) talked will talk They along the street now. (3) Isaw the bird. [「一度・・・したことがある」 という文に] I the bird once. (4) We live in Kobe. [「5年間ずっと… している」 という文に] 現在完了形: <have [has] + 過去分詞> We in Kobe for five years. (5) Jack is waiting for the news. ●進行形: <be動詞+動詞の -ing形〉 現在進行形 am [is, are] talking 過去進行形 was [were] talking ●現在完了進行形 : 〈have [has] + been + 動詞のing形〉 「ずっと・・・し続けている」 Yui has been playing tennis for two hours. ( 結衣は2時間ずっとテニスを し続けています。) 7

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