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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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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

答え教えてください☺︎♪

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理科 中学生

この赤線の問題が分かりません💦 詳しい解説よろしくお願いします🙇‍♀️

〔12〕 図1は、ボーリング調査が行われたA~C地点とその標高を示す地図であり、図2は、A~C 地点での地層の重なり方を表した柱状図である。 A地点の砂岩の層からアンモナイトの化石が 見つかっており、この地域はかつて海の底であったことが分かっている。 次の問いに答えなさ い。ただし、この地域に凝灰岩の層は1つしかなく、地層の上下逆転やずれ、傾き等はみられ ず、各層は平行に重なっているものとする。 図 1 北 100m 99m 98m 97m 96m_ 北4 14 HA Co 図2 2 地表からの深さ [m] A ROLE B -96₂ (4) B地点の柱状図はどのようになるか。 かきなさい。 ・泥岩 ・砂岩 ・れき岩 (1) A地点の砂岩の層からアンモナイトの化石が見つかったことから、この層ができたのは中生 代であると推定できる。このように、地層ができた年代を知る手がかりとなる化石を何という か。 名称を書きなさい。 【知識・技能】 ④7 ・凝灰岩 (2) アンモナイトのように、 地質年代を推定できる化石として利用できるのはどのような生物か。 「期間」「範囲」 ということばを用いて簡単に書きなさい。 【思考・判断・表現】 48 (3) A地点の地表から地下5mまでの層の重なりのようすから、A地点の水深はどのように変化 したと考えられるか。 粒の大きさにふれて、簡単に説明しなさい。 【思考・判断・表現】 49 【思考・判断・表現】 50

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