數學 國中 2年以上以前

國一數學謝謝

5 (2)(-)- 2G 3 (3)(一 - 其 3. 計算下列各式的值: (1) ( 2 = ( 2 -0.5)-(-1)×(-8)+ +4 = 2) (-2)** (-4)2-(-5)=(-})= 1 1 (2)(一 - O 3 齿数2)指數律 。

英文 國中 約3年以前

求解27.🙏🙏

11 all over the world. ing Love, Sam 26~28 Oliver: What are you reading, Katie? 少了数226 Katie: I'm reading some stories about amazing kids that Time magazine wrote. Their stories make me believe that kids can do anything. Oliver: That sounds cool. Can you tell me about them? Katie: Sure. This one is about Gitanjali Rao, and she is an amazing scientist. She uses the science and technology she learns at school to make the world a better place. She made an app to stop people from being bullied on the Internet, and now she is working on how to detect biological contaminants inside water so people in the third-world won't get sick from it. Oliver: She sounds really smart. What about this one, Tyler Gordon? Katie: Tyler is a student who is hard of hearing and speaks very slowly. He was bullied a lot at school, which made him too scared to say anything. That did not stop him from expressing himself! He is an amazing artist and likes to draw portraits. He has drawn portraits of many famous people, and his talent is plain for everyone to see. Oliver: Good for him! Katie: And look at this boy, Ian McKenna! He is good at gardening. He is using his talent to grow vegetables for the people in his city. That's an amazing thing to do. Oliver: Thank you for sharing these stories with me, Katie! I feel like I can do so much more. S Scientist 科學家 bully 霸凌 detect 偵測 biological contaminant 生物污染 portrait le talent the 0)26. What can we know from the dialogue? 摘取 (A) Different people have different talents. 大意 Am (B) Famous people believe in themselves. (C) Kids are too young to change the world. (D) We become amazing by sharing stories with others. A 127. Which is NOT true? 指出 (A) Ian McKenna has a green thumb. (B) Oliver believes he can do more. 細節 (C) Gitanjali Rao is good at science. (D) Tyler Gordon is a bully at school. D

數學與統計 大學 約3年以前

（統計）有沒有高手會，快來救救我ಥ_ಥ

市,之感電池,客時 13 個萬 10 電池,其平均非命如下表(假設平均 本命態分配),试在顯著水準a-4.1之下,檢定: 平均壽命(小時) 150 15 10 13 16 了。 120 (1)請分別以「富裕區間檢定法,「顯著性被定法」檢定甲、乙丙種電池寿命的變異數 是否相等?(1090) (2)清瓷觉甲路電池之平均杀价是否顯著高於乙部(5%) (3)(境承上数2) P牌電池之標準差增加至20 小時,请重新檢定小 (2)之結果:(10) (4)(简承上題 2)若此為 Behrean-Fisher Probleel,請重新检定小題 (2)之結果。 (56) (5) 鐵承上題 2)若甲乙丙礙鹿電池之真實母體變異數關係為2:1,请重新核定小(2)之 品采,{"ps)