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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

エレメント2のレッスン6のComprehensionとVocabularyの答え教えてください

96 Comprehension Life 2. Bruce Edwards changed A Reading for main ideas: Choose the best answer. 1. What is the main idea of the passage? a The development of the role of caddies. bThe fighting spirit necessary for athletes. The friendship between a golfer and a caddy. B Reading for details: Fill in the blanks with the words in the box below. There a unnecessary words. Then divide the paragraphs into the following sections. 11 9 3 4 5 16 Caddy for Life 1 2 8 10 a the way people saw caddies b his career from a golfer to a caddy golf courses so that golfers could play safely There was a very (1. ) caddy called Bruce Edwards. ) from high school, he started to work for Tom Watson as a Caddies used to just carry the golf bag for golfers, but Bruce always (3. After Bruce (2. condition of the course. Bruce was also not afraid to (4. ) with the golfer. ), Watson wanted to play less, so Bruce decided to work for Greg After many (5. Bruce missed Watson, and he decided to return to Watson after three years ( After they started to play together again, Bruce began to have some (7. Bruce was (8. ) with ALS, but he continued to caddy for Watson. ) at the US Open. Introduction Becoming Watson's caddy ( Separation and reunion Deadly diagnosis ( The last chance together in the spotlight ( Epilogue ) ) ) Vocabulary A Choose the correct definition 1. What's the distance from 2. I'm glad we have this opp 3. It was heartbreaking to 4. My aunt was taken to hos 5. His name now became a making you (b) the amount an unimpo d a chance to relating to C Listening for details: Listen to the statements and answer T(true) or F(false). 1.( ) 2. ( ) 3. ( ) 5. ( ) 4. ( Both Watson and Bruce (9. 2. Could you move over Watson and Bruce knew this could be their last time together in the (10. Could you move ou Watson asked for (11. ) to do more research on ALS, and Bruce w 3. They sat down and t ) for having someone like Watson with him. (12. They sat down an Paragraph Organization ) B Choose the correct word for 1. She strongly (disagree 2. Is there a (direct / dir Words diagnosed / disagree / exam funding/special/sorro separation /health/spoti thankful/graduated victories / weaker/appea D Retelling the story: Look at the pictures on pages 92-93, and retell the story. 3. He was (desperate / d- C Fill in the blanks to rephra 1. The teacher is now co- The teacher is now - 4. If you really want th If you really want 5. He finally admitted He finally ( - Tips caddy caddy は caddie と綴られる for a golfer)」を意味するとと caddy for a golfer)」 という意 として使えるかどうかをまず推

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英語 高校生

一枚目の写真の回答がわからないです全て 教えてください

bkao bib yotth 日 A Reading for main ideas: Choose the best answer. 1. What is the main idea of the passage? The development of the role of caddies. ⑤ The fighting spirit necessary for athletes. © The friendship between a golfer and a caddy. Yabluos od b tol i 6haahgot 2. Bruce Edwards changed cxthetoag the way people saw caddies b his career from a golfer to a caddy greoya0 Sregnig © golf courses so that golfers could play safely B Reading for details : Fill in the blanks with the words in the box below. There are som unnecessary words. Then divide the paragraphs into the following sections. There was a very (1. ) caddy called Bruce Edwards. 1 After Bruce (2. ) from high school, he started to work for Tom Watson as a caddy. 2 Caddies used to just carry the golf bag for golfers, but Bruce always (3. 3 condition of the course. ) the Bruce was also not afraid to (4. )with the golfer. 4 After many (b. ), Watson wanted to play less, so Bruce decided to work for Greg Norman. 5 6 Bruce missed Watson, and he decided to return to Watson after three years、 (6. 7 After they started to play together again, Bruce began to have some (7. ) problems. 8 Bruce was (8. ) with ALS, but he continued to caddy for Watson. Both Watson and Bruce (9. ) at the US Open. 9 10 Watson and Bruce knew this could be their last time together in the (10. Watson asked for (11. 11 (12. ) to do more research on ALS, and Bruce was very ) for having someone like Watson with him. Paragraph Organization Introduction Words en aih g) Becoming Watson's caddy ( Separation and reunion Deadly diagnosis The last chance together in the spotlight ( diagnosed / disagree / examined funding / special/ sorrow separation / health / spotlight thankful / graduated victories / weaker / appeared へ へ Epilogue へ

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