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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

答え教えてください☺︎♪

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英語 高校生

日本語訳をお願いしたいです!!お願いします

次の英文を読んで、設問に答えなさい。 Everybody wants to eat delicious and safe food. However, exposure to different cultures reveals 2 how people's attitudes towards food safety and taste are not all innate or biological. Assumptions and practices regarding the preparation and presentation of food highlight the influence of culture on what and how people eat. For example, in one culture, some kinds of fresh ingredients might be considered edible (a), that is, without any kind of preparation like washing, peeling or heating. Yet in another culture, the same foodstuff may require some kind of preparation before it can be eaten. It is often difficult for people from the same culture to view such activities and beliefs objectively, and so witnessing the food practices of other cultures can be surprising. Sashimi is a great example of this. While sashimi may be the result of several steps of preparation from cleaning and cutting, to a particular style of presentation - heating is not one of these steps. (2)Japanese consumers take it for granted Cultures, the conventional belief may be that real and fish require some sort of cooking, such as baking or frying, (3) in order (b) them to be considered edible. In these cultures, sashimi is not thought of as raw, delicious and safe to eat, but rather as uncooked, and therefore possibly unsafe to eat, regardless of how it may taste. Fresh chicken eggs are another raw foodstuff commonly eaten in Japan — as a topping for rice, or as a dipping sauce for sukiyaki, for example but most people in the UK or the USA believe that chicken eggs require some kind of heating before they are fit for human consumption. However, the ways in which people from other cultural backgrounds eat certain foods might be considered equally unconventional by many Japanese. For example, few Japanese would eat the skin of apples or grapes. In this case, the difference involved in the preparation of the food is not the use of heat, but the removal of part of the foodstuff. People in much of the world eat apples and grapes without peeling them. A European might think, What could be more healthy and delicious than picking an apple from the tree and eating it?' But this way of thinking is not shared by a large number of Japanese. (4) It is clear that different cultures have different conventions regarding the preparation of particular foods, and different beliefs about what is considered delicious. However, there is no question that some common food preparation practices - or sometimes a lack of certain food preparation processes - are unsafe from a scientific point of view. However delicious they may be, raw meat and fish can contain the eggs of harmful parasites like tapeworms, which are often undetectable. If chicken eggs are not properly stored, and are left unconsumed for a long time, they can easily produce bacteria like salmonella. The poisoning caused by salmonella does not usually require hospitalization, but it can be very dangerous for young children and elderly people. In addition, while eating the skin of apples and grapes may be a good source of dietary fiber, one also runs the risk of consuming insecticides, the poisons that are used to protect many non-organically farmed fruits from insects. So, while there may be 'no accounting for taste' beyond culture, safety is a different issue, and (5) we should always be aware of the risks involved with culturally accepted methods of food production and consumption. 問1 下線部 (1)で,空欄 ( a )に入る最も適切な語句を, (A)~(D)から選び, 記号で答えなさい。 (A) as is clear (B) as is fresh (C) as they are (D) as unclean 問2 問3 問4 問5 下線部(2)を日本語に訳しなさい。 下線部 (3)の空欄(b)に入る語(1語) を書きなさい。 下線部(4) を日本語に訳しなさい。 下線部 (5)の理由として最も適切なものを, (A)~(D) から選び,記号で答えなさい。 (A) Eating raw chicken eggs or unpeeled fruits can be dangerous in certain conditions because of harmful bacteria or pesticides. (B) Eating unpeeled apples or grapes may cause weight gain. (C) Only young children and elderly people are vulnerable to particular bacteria. (D) Beliefs about what is considered delicious actually come from better understanding of food preparation. 問6 本文の内容と一致するものを, (A)~(G)から3つ選び,記号で答えなさい。 (A) By food preparation processes, the author exclusively means the use of heat. (B) Culturally established ways of consuming food may conflict with scientific principles of food safety. (C) In some food cultures outside Japan, fish in its raw state is not categorized as an edible foodstuff. (D) People having little contact with other cultures tend to view their own food-related conventions as natural and standard. (E) Repeated exercise is required for the mastery of any food preparation. (F) Instinct alone determines what and how people eat. (G) All cultures around the world consider it natural to eat unpeeled fruit.

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数学 中学生

この中で間違ってる問題ってありますか?

Solve the following equations. (1) 5 - (x − 1) = 4 5-x+1=4 6- x = 4 (3) (5) (7) -x = 4-6 -X = -2 7x - (3x) = 141 7x-3+x=141 8x-3 8xx 3(x − 2) = −2 − x 3x-6=-2-x 3x + x =141 =141+3 = 18⁰ =-2+6 4x = -4 3(4x) + 2(x - 1) = 14 12-3x + 2x - 2 = 14 10-x = 14 =14-10 x = -4 (9) 3(1-x)+2(4x + 7) = 12 3-3x + √x + 14 = 12 =12 =12-17 17+5x 5x (11) 5(2-x)+2(3x + 1) ='6 10 - 5x+ 6x +2=6 12 + bc = 6 x = 6-12 x = -6 (13) 19(x - 2) = 7(2 − x) 192c-38:14-7x 19x +7x² = 14 +38 26x=52 (15) 3(2+x) * 4 ≤ 94 − x 6 + 3x -4 = 94-x 94-2 2+3x 94-2 3x+241 92 (17) 4-(x - 52)=2x - 79 4-x+52=2x-179 56-x =2x-79 -x-2x =-79-56 3x -3x₂²-132 (19) 3(2-x) + 2(3x + 4) = −10 6-3x+6₂+ 8 = -10 14+3x -10 =-10-14 - 3x=24 x = 8 (2) 3 - (2x − 8) = −3 3-2x+8=-3 11-2x-3 -2x = -3 -11 -2x = -14 (4) 2(x − 9) = x + 10 2x9 = x + 10 2x -x = 10 + 9 x = 19 (6) 2(9 + x) + 4 = 55 - x 18+2x+4:55-x 22+2x=55-x 2x+2₂² = 33 (8) 7(x - 2) = 8(x − 3) ¹7x-14 = 8x - 24 ¹7x-8₂ = -24 +14 =-10 -x x = 10 (10) 6(x+5) = 9x + 6 6e +30= 9x+6 bx-9x =55-22 =6-30 - 3x = -24 x 8 (12) 7(x+13) = 4(x +19) 7x + 91 = 4₂c + 76 7x-4%3x =76-91 =-15 = -5 (14) 4x -3x - 5) = 23 4x -3x+15=23 x +15 = 23 3 -15 x (16) 3(x - 5) – Š(13 – x) = 0 32-15-65+50c=0 82-808x8+80 8* 68+58x=696 126x=696 11.6 58 (18) 6x = 602(12-x) 6₂ = 696-58x 4x + 9₂ = » (20) 4(x+3) - 9(8 - x) = 83 42 +12-237 + 9x=83₁ ・83-12-27 - 13x =71-27 x 1/14

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