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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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英語 高校生

エンパワー2 レッスン20 答えわかる方お願いします💦

dy in they my uld ンク Practice 1 Fill in the blanks and complete the sentences. 1. He lived in London for a year. He talks ( )( ) he ( ) all about that city. 彼は1年間ロンドンに住んでいました。 彼はまるでその町のすべてを知っているかのように話します。 ) I ( ) a chance to live abroad, too. 2. I( 私も海外に住む機会があればいいのになあ. eelarox3 weive 3. With that kind of opportunity, my life ( )( そのような機会があれば、 私の生活は今よりもっと楽しいでしょうに、 4. If I ( ) ( ) a high school student, I (1) ( starting from tomorrow. もし私が高校生でなかったら, 明日から外国に行って生活するでしょうに. ) happier than it is now. 2 Change the words to the appropriate form and complete the sentences. 1. I wish my friend (lend) me this magazine about studying abroad a year ago. 友だちがこの留学についての雑誌を1年前に貸してくれていたらよかったのになあ. 3. If I (study) abroad last year, my English (will improve). 去年留学していたら,私は英語が上達していたでしょうに LESSON 2. If I (read) this magazine, I (will know) about this overseas study program earlier. もしこの雑誌を読んでいたら, もっと早くこの留学プログラムについて知っていたでしょう。 ) and live abroad ~しようと思う think of doing ~を専攻する major in ~ 3 This is a reply giving advice to the email presented at the beginning of this lesson. Put the Japanese parts of the passage into English. Genre dars id sort stof Dear Yumi. gute oni Your parents are right. Think of the advantages of studying abroad. I studied in Italy for a year. ① もしこの経験がなかったら、私は大学で美術史を専攻しようと思わなかったでしょ う. ②もしこのチャンスを逃したら、 あなたは後でそれを後悔するでしょう。 In the future, you may ask yourself, “③ もしあのとき留学していたら、私の人生はもっとわくわくするもの になっていただろうに.” ④ もし私があなただったら、このチャンスを逃さないでしょう. Best wishes, Emma ~を逃す miss Your Turn A Make a pair and ask your partner the following questions. 1. If you had a chance to study abroad, where would you like to go? 2. If you studied abroad, what would you miss the most about Japan? B Based on the dialog above, write a passage about where you would like to go if you had a chance to study abroad and what you would miss the most about Japan. 55 PARTI

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