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英語 高校生

このプリントの答えがわからないので、間違っているところのご指摘お願いします。 VisionQuest NewEnglish grammar47という教材です。乱雑な字で申し訳ないです。

Vision Quest Lesson 4 HO 1年 *EL 1 ( )内から適切なほうを選びなさい。 AB 1. Ann (takes) is taking) a walk in the park every morning. 2. Water (boils)/ is boiling ) at 100°℃. 番氏名 3. She (talks / is talking) on the phone now. 4. I (buy/am/buying) books on the Internet once a week. 5. Do you know the saying "Knowledge (is) was ) power"? 2 日本語に合うように,( )に適切な語を入れなさい。 AB 1. 私はいつも8時間寝る。 I (always) (sleep) for eight hours. 2. 私の父はスマートフォンを2台持っている。 (My father has). two smartphones. 3. サナは日本映画があまり好きではない。 Sana (doesn't) (like ) Japanese movies very much. 4. あなたは最近数学を一生懸命勉強していますか。 (Do >< you) (study) math so hard these days? B 3 ( )内の語句を並べかえて、英文を完成させなさい。 ただし、不要な語句が1つあります。 CD 1. (Tom/passed / passes / the exam) last week. Tom passed the exam last week. 2. (Bill/ going / went / fishing / often) with his friends when he was a child. Bill often went fishing 3. My younger sister (was/in/a / reading / reads / novel) the living room last night. was reading a novel in

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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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