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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

至急!!!この問題が分かりません! わかる人教えください!問1から問10までお願いします🙏

Unit 2 長文問題Ⅱ ミツバチは女社会? 1 Have you ever experienced a bee sting? If you have, you may (1) not be fond of bees. However, they are very interesting and honeybee society is very similar to ours. Let's look at some interesting facts about it. 2 Honeybees live together in groups of 20,000-80,000 in a beehive. This group is call] a colony and the bees in the hive can be categorized into three types: a single queen, tens of thousands of worker bees and hundreds of drones. 3 A queen bee's job is to lay eggs all her life. Each day the queen bee lays around 2,000 eggs. The average lifespan of a queen is three to four years. Does the queen "rule" the colony? No. Her duty is simply egg- laying. In fact, the queen bee has a smaller brain than a worker bee. Target ①現在完了形 現在完了進行形 ② 名詞・冠詞 人称代名詞 ③ 受け身 (6) sting 刺すこと,~を刺す be fond of lifts honeybee ミツバチ be similar to ~に似ている beehive ハチの巣 colony コロニー categorize ~を分類する tens of thousands of 何万もの〜 drone 雄バチ lay eggs 卵を産む lifespan (5) 4 The worker bees are the largest population in the hive. They are all female bees but can't lay eggs. A worker bee's life is rather short. They live around 40 days. Their job is to keep the queen bee happy. They do all the work but change jobs as they grow. For about a week after birth, they mainly clean the hive. Sometime between five to sixteen days after birth, they usually take care of the babies and help to build the hive. When they become twelve to eighteen days old, they carry food. After that, they guard the hive entrance. When they are three weeks old, they fly out the hive, pollinate plants and collect food. If you're a drone bee, life is hard. You're [ bear ], live for a month or two, and then die. During that time, you're not a productive member of the hive-you can't collect pollen or help to look after eggs, like worker bees-and you can't even sting anyone. Drone bees live with one thing in mind: mating with a queen. When they're lucky, they (7) can, but they die soon after that. 5 (8) 6 Every bee in the hive has a part to play in the survival and success of their kind. Bees have been living like this for ages. They work together and live in harmony. rule ~を統治する duty. female 雌の rather かなり as ~につれて guard 守る pollinate 授粉する productive pollen E Poj (2) C (7) in mind 考えて mate with ~と交尾する success, ** in harmony 問 1 調和して、仲良く PLE (4 (E

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英語 中学生

至急お願いします🙇‍♀️すみません💦 問1から問10まで分かりません😓 教えてくれると嬉しいです! 解説あると助かります🙇‍♀️

Unit 2 長文問題 Ⅱ ミツバチは女社会? 1 (1) Have è you ever experienced a bee sting? If you (2)have, you may not be fond of bees. However, they are very interesting and honeybee society is very similar to (3) Ours. Let's look at some interesting facts about it. 2 Honeybees live together in groups of 20,000-80,000 in a beehive. This group is [call ] a colony and the bees in the hive can be categorized into three types: a single queen, tens of thousands of worker bees and hundreds of drones. Target ①現在完了形 現在完了進行 ② 名詞・冠詞 人称代名詞 ③受け身 queen bee 3 A queen bee's job is to lay eggs all her life. Each day the lays around 2,000 eggs. The average lifespan of a queen is three to four years. Does the queen "rule" the colony? No. Her duty is simply egg- laying. In fact, the queen bee has a smaller brain than a worker bee. 4 The worker bees are the largest population in the hive. They are all female bees but can't lay eggs. A worker bee's life is rather short. They live around 40 days. Their job is to keep the queen bee happy. They do all the work but change jobs as they grow. For about a week after birth, they mainly clean the hive. Sometime between five to sixteen days after birth, they usually take care of the babies and help to build the hive. When they become twelve to eighteen days old, they carry food. After that, they guard the hive entrance. When they are three weeks old, they fly out the hive, pollinate plants and collect food. 5 If you're a drone bee, life is hard. You're [ bear ], live for a month or two, and then die. During that time, you're not a productive member of the hive-you can't collect pollen or help to look after eggs, like worker bees-and you can't even sting anyone. Drone bees live with one thing in mind: mating with a queen. When (7) can, but they die soon after that. (5) they're lucky, they (6) 6 sting 刺すこと、~を刺す be fond of ~を好む honeybee ミツバチ be similar to 「~に似ている beehive ハチの巣 colony コロニー categorize ~を分類する tens of thousands of 何万もの〜 drone 雄バチ lay eggs 卵を産む lifespan Every bee in the hive has a part to play in the survival and success of their kind. Bees have been living like this for ages. They work together and live in harmony. rule ~を統治する duty. female 雌の rather かなり as 〜につれて guard 守る pollinate 授粉する productive 生産的な pollen E 問 1 in mind 考えて mate with ~と交尾する in harmony (2) ( (7) C success ** 問: 調和して、仲良く 問 Pa (4) (6) あ

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英語 高校生

(A)の問題の(1)~(6)までの答えと訂正した回答を教えてほしいです。よろしくお願いします。

【4】 次の設問 (A), (B) に答えよ。 (配点 30> (A) 次の(1)~(6) の各英文には、下線部ア~エのいずれか1つに文法・語法に関して不 適切な あるいは文意を通らなくする箇所が含まれている。 その下線部の記号を記せ。 ア (1) It is estimated that the surface temperature of our planet has been risen by about half a degree Celsius, compared to a hundred years ago, and some scientists believe it's going to get warmer yet in the years to come. (2) In English-speaking cultures, children are often told to say "please" when asking for something. By so doing, they are more likely to be given イ permission than they do not. If they don't, their parents give them a hint, by asking them " What's the magic word?" Trying to forecast weather is incredibly complicated. Some scientists P believe that no matter how advanced science is, weather is impossible to イ predict it accurately, because there are too many random elements involved. (3) Inuits are a related group found in Alaska, and also in Canada and Greenland. They are thought to have spread into North America from Siberia many thousands years ago. In both the US and Britain these people are ウ often called Eskimos but the name Inuit is now preferred and is becoming more widely used. 5) The Cold War is a term for the political conflict between the capitalis countries of the West and the Communist countries of the East that begar 7 after World War II. Both sides had large military forces which were kep イ ready for war, and threatened at each other with nuclear weapons. I

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英語 中学生

問2と問3と問4を教えてください!

14) 次の英文を読んで、あとの各問いに答えなさい。 Jack is writing an e-mail to Mike now. Hi, Mike. I arrived in Hokkaido two weeks ago. My school here is wonderful! I can't speak Japanese well yet, but I've made friends with many students at school. I read some books about Japan before I came here, but 5 school life are new to me. many things about Japanese "C For example, an interesting thing happened at lunch time on my first day at this school. After the fourth class finished, suddenly my classmates began to eat lunch in our classroom! And they put their lunch boxes on their own desks! I couldn't believe it. So I asked my friend, Takeshi, "Aren't your desks for studying?" He 10 looked a little surprised and answered, Of course they are, but we use them when we eat lunch, too. Why do you ask?" Another interesting thing happened after school that day. After we finished our class, some students started to clean the classroom. That also surprised me. Because our school in America has a "cleaning staff, students and teachers don't have 15 to clean. The next day, I cleaned my classroom with my classmates for the first time. After cleaning with them, I felt good. I think that it's good for students to clean the places that they use. 100点 *Lastly, we have our school trip for five days next month. You may also be interested in this because our school in America doesn't have such a long trip. I'm 20 very happy because I will go to Kyoto, Tokyo, and other places in Japan. Now my classmates and I often talk about our school trip. It is interesting to plan what places we will visit in Japan. I want to see some famous places and old Japanese buildings with my own eyes. I sometimes feel there are many differences between Japan and America. This 25 makes my life in Japan very exciting every day. I'll tell you about my school trip next time. () surprise cleaning staff ‡‚ (= janitor) [問1] 下線部 ① を, ほぼ意味が同じで次のように書きかえるとき, 1語が入るか答えなさい。 There are many things that I didn't lastly 最後に, 終わりに にはそれぞれどのような (15点) know about Japanese

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英語 中学生

文章の内容があまり理解できません。 ざっくりで良いので内容を解説して欲しいです🙇🏻‍♀️

About 50 years ago, I lived in Los Angeles, California. My father took care of my younger sister and me. We played baseball every weekend. My sister and I loved baseball. I knew that my father had a "hero. His name was Ken Smith. He played for a team in *St. Louis. Its name was the Red Birds. My father said that Ken was the greatest player of all *major league baseball players at that time. I also became a big fan of Ken Smith, so I wanted to be like Ken Smith very much. That summer was special because my father *took my sister and me to St. Louis. We went there and came home by *plane. We were going to meet Ken Smith. I almost couldn't believe that. My father's best friend had a big *company in St. Louis, and he knew some of the very important people of the Red Birds. He also knew Ken Smith well. We stayed at my grandmother's house in St. Louis, She said to me, "Jack, I have something special for you." That was a ball with an *autograph by Smith. An *injured player of the Red Birds was in the hospital, and my grandmother worked there. She told him my story, and he got Smith's autograph on the ball. She knew that A but she gave the ball to me. I was sorry for my father, but I was very happy. I liked Ken Smith more. The next day was an exciting day for us. My father's friend helped us, and we could meet Ken Smith before the game. I thought Smith would be kind and big, and I was right. Then I showed him the ball from my grandmother. We talked about it. He asked me about the way to practice baseball, and I talked to him *proudly. *In front of Ken, I felt that I needed to do so. I wanted to be a great baseball player. He *understood. That night we watched a night game of the Red Birds. During the game, I *held my ball, and looked at it many times. A man talked to me. "New ball?" he asked. "Yes, with an autograph," I said and smiled. "Who?" he asked. "Ken Smith," I said proudly. "Really? I don't believe you." "Here, look." "Wow! I'll get it for 20 *dollars right now!" "No, give my ball back to me, please," I said. "You've got a very special thing. Take good care of it!" he said. I knew that the ball was a *treasure for me. The next day, 3I felt it took a long time to get back to Los Angeles. I was excited and I told my friends about my experience with Ken Smith in St. Louis. No one believed me, but I thought that I would never forget my happy feelings then. About 20 years later, my father died. Before the *funeral, I *remembered that he once *asked us to put his *baseball cards and a *baseball in his *casket. I wanted to use my baseball with Ken's autograph for him. My sister also liked my idea. The ball was with my father. A few years later, my sister *got married. Before *wedding finished, my sister started a story. She was a *flight attendant and *flew with the baseball players of Los Angeles Blue Sky and the manager Tom Baylor. Then she told him the story of my old baseball. He understood her story very well. Baylor was a friend of Ken Smith and *promised her to get another ball with Ken's autograph for me. Ken *was very impressed by her story, and sent a baseball with his autograph to Baylor. The ball was then sent to my sister. When she finished the story, I looked up and saw that she was holding a ball. "I have B threw it to me. I remembered that summer and my grandmother. I felt like a child again when I was going home. she said and

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