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

答え教えてください☺︎♪

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一枚目　長文 二枚目　問い 三枚目　答え この問いで色々と疑問点がありしつもんしました。 ①一枚目の付箋（上の）に書いていますがservethemselvesが再帰代名詞になるらしいんですけど訳し方が不明です。 ②一枚目の付箋（下の）に書いていますが緑色の斜線で囲んだ... 続きを読む

serve themselve) i Reading 速読問題 次の英文を2.5分で読んで, 1. の問いに答えなさい。 訳の drau 目標 20分 (he) A new *retail concept was introduced in the United States when the first self-service "grocery store named Piggly Wiggly/opened in 1916// Before that, customers used to starframent. bring a shopping list to a neighborhood store and wait while a store clerk collected the items they wanted and measured out products like *flour and rice from large 一方で新しい containers. On the other hand, Piggly Wiggly gave customers baskets and asked (容器) (2) を…の状態で出す くて食べ物] them to serve themselves. They filled their baskets with packets of flour and rice, TE shelf 複数形 (食料品) (棚) cans of vegetables, and other groceries from the store's shelves.. BIRG stocenes from the souhogo を (3)Sales at Piggly Wiggly tog of ondo JB9Tg в Beim J'mol (一般的に) typically bought more when they *made their own selections. 18 15 were higher than at other adow ow: Jeal lliw sIBE odT x (42-=) anel hiny-neque euiq email easly ams 10 expanded to become a chain of stores, and other markets copied the self-service (拡張する) (まねする) (Copy)id behoo (4) Writi model. The modern supermarket was born. ¹ retail [rí:teil]: 9 make a selection : er stores, because customers I& rado nol esmeni ingi 0212 di betuoosi - labom jealsi eril of egneriaxe ens.] It influenced not only the way people shopped but also other aspects of the food 2 grocery store # 12 aspect [æspekt] : wilsop-deid bat0qml ( CAN-DO List (製造会社) a'sibns? vol. business. For example, food manufacturers started using more attractive packaging (6710) Teunitnoo elsa erti lliw gnol wol Soon Piggly Wiggly in order to draw customers to their products. 19dor to bus odi is gainn (168 words) LET muvola Ikan Ce yebir azon Ion] D 4 flour [fláuǝr]: d boy mo lan <知識・技能〉第4文型, 第5文型について理解できる。 <思考力・判断力・表現力〉 近代的なスーパーマーケット esanal juodliw soment bathoml 1.

一枚目　長文 二枚目　問い 三枚目　答え この問いで色々と疑問点がありしつもんしました。 ①一枚目の付箋（上の）に書いていますがservethemselvesが再帰代名詞になるらしいんですけど訳し方が不明です。 ②一枚目の付箋（下の）に書いていますが緑色の斜線で囲んだ... 続きを読む

serve themselve) i Reading 速読問題 次の英文を2.5分で読んで, 1. の問いに答えなさい。 訳の drau 目標 20分 (he) A new *retail concept was introduced in the United States when the first self-service "grocery store named Piggly Wiggly/opened in 1916// Before that, customers used to starframent. bring a shopping list to a neighborhood store and wait while a store clerk collected the items they wanted and measured out products like *flour and rice from large 一方で新しい containers. On the other hand, Piggly Wiggly gave customers baskets and asked (容器) (2) を…の状態で出す くて食べ物] them to serve themselves. They filled their baskets with packets of flour and rice, TE shelf 複数形 (食料品) (棚) cans of vegetables, and other groceries from the store's shelves.. BIRG stocenes from the souhogo を (3)Sales at Piggly Wiggly tog of ondo JB9Tg в Beim J'mol (一般的に) typically bought more when they *made their own selections. 18 15 were higher than at other adow ow: Jeal lliw sIBE odT x (42-=) anel hiny-neque euiq email easly ams 10 expanded to become a chain of stores, and other markets copied the self-service (拡張する) (まねする) (Copy)id behoo (4) Writi model. The modern supermarket was born. ¹ retail [rí:teil]: 9 make a selection : er stores, because customers I& rado nol esmeni ingi 0212 di betuoosi - labom jealsi eril of egneriaxe ens.] It influenced not only the way people shopped but also other aspects of the food 2 grocery store # 12 aspect [æspekt] : wilsop-deid bat0qml ( CAN-DO List (製造会社) a'sibns? vol. business. For example, food manufacturers started using more attractive packaging (6710) Teunitnoo elsa erti lliw gnol wol Soon Piggly Wiggly in order to draw customers to their products. 19dor to bus odi is gainn (168 words) LET muvola Ikan Ce yebir azon Ion] D 4 flour [fláuǝr]: d boy mo lan <知識・技能〉第4文型, 第5文型について理解できる。 <思考力・判断力・表現力〉 近代的なスーパーマーケット esanal juodliw soment bathoml 1.

3〜6番と18番の答えお願いします。答えがないので教えて欲しいです。早めにお願いしたいです。

英単語/句動詞 (26点) 1. She decided to her career goals. A) turn down B) turn up C) turn around D) turn out the job offer because it wasn't the right fit for 2. When baking the cake, she accidentally an important ingredient. A) leave off B) leave for C) leave up to D) leave out 3. His strong leadership skills will A) make for B) make out C) make up for D) make up his mind 4 the success of the project. 4. While exploring the old library, she dusty shelf. A) come up with B) come around C) come across D) come about a rare book hidden behind a the bad weather, the team continued to play their best. 5. A) Due to B) Because of C) Despite D) Owing to the difficulties they faced, they still managed to finish the project 6. on time. A) Nonetheless B) However C) Though D) Therefore 7. Before making a decision, it is important to A) disregard B) consider C) neglect D) overlook 8. She decided to A) buy B) sell C) trade D) return the dress she had been eyeing for weeks. all the available options. 9. The company experienced a high rate of due to the stressful environment. in their workforce

命題の真偽(3)です。なぜ以下の答え方では間違っているのでしょうか？？よろしくお願いします🙇🏻 答え√2が無理数でないと仮定すると2つの自然数m、nを用いて√2＝m/nと表すことができる。(ただしm、nは互いに素)両辺を平方すると2m^2＝n^2。2m^2は2の倍数であ... 続きを読む

....に対して」 という表現が含まれています. (3)√2が有理数と仮定すると, 2つの自然数m,n を用いて√2= n と表せる. m まず結論の否定 (ただし,m,nは互いに素) 両辺を平方すると, 2m²=n² 左辺は偶数だから,n² も偶数. すなわち, nも偶数. このとき, n²は4の倍数だから2m²も4の倍数. よって, m² は偶数となり, mも偶数. ゆえに, m とnは共通の約数2をもつことになり, mとnが互いに素であることに矛盾する. よって,√2は有理数ではない。 すなわち,√2 は無理数. 最大のポイント

この問題が分かりません😭丁寧に解説していただけると助かります！！、！！

II x³ 2 - 関数f(x)= + について,次の各問に答えよ。 24 I (1) f(x) の導関数を求めよ。 (2) f(x) の増減を調べ, 極値を求めよ。 (3) 曲線 y=f(z)上の点 (a,f(a)) (a>0) における接線lが原点を通るとき,lの方程 式とαの値を求めよ。 (4) a は (3) で求めた値とし, 関数 f(x) が極小となるときのxの値をbとする。曲線 y=f(x) (b≦x≦ a) の長さを求めよ。

情報に出てくるIPv4の意味が全然理解できないので簡潔に教えて欲しいです

NaCH3OOはなんでNaが先に来るんですか？

化学 11.12教えてくださいお願いします

II 次の 10 19 に入れる最も適当なものを,それぞれの解答群から一つ] 選び, 解答欄にマークせよ。 ただし, 同じものをくり返し選んでもよい。 また、原子量 はH=1.00, N = 14.0, 16.0, S = 32.0, Ag=108, Pb=207, ファラデー定数は 9.65 x 104C/mol, 標準状態における気体1molあたりの体積は22.4Lとする。 〔1〕 図のように,酸化鉛(IV)でできた電極Aと, 鉛でできた電極Bの2種類の電極を 希硫酸中に浸して導線でつなぐと、導線に電流が流れる。 このとき,それぞれの電極 10 で では以下のイオン反応式で表される反応が進行しており, 酸化鉛(ⅣV) は 還元される 活物質として機能している。 10 MORZE er [電極A] PbO2 + 4H + + SO4 2- + 2e_ PbSO4 + 2H2O [電極 B] Pb + SO- PbSO4 + 2e → 8.81 (0) この電池を用い, 3.86 A の一定電流で 1.00時間放電を続けると, 放電前と比べて 電極Aの質量は 11 g増加し,電解液(希硫酸)全体の質量は 少した。 12 g減 さらに長時間放電を続けると起電力が低下したため, 電極間をつないだ導線を外し 13 を電極に, 14 て放電を停止し, その後, 外部の直流電源の 電極Bにそれぞれつないで電流を流すことにより,起電力が回復した。 ×② OE & O le a @ 導線 電極 A 酸化鉛 ->>> (IV) 電流計 SS @ 電極 B 電解液(希硫酸) 鉛 81 at ded)st @ af