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một tòa nhà cao tầng một người ở( vị trí a) có tầm mắt cách mặt đất 30m nhìn xuống vị trí c dưới một góc hạ là 60 độ . tính khoảng cách từ chân tòa nhà (vị trí b) đến c (làm tròn lên chữ số thập phân thứ 2)

Làm hộ em một cái avt dễ thương nha dùng app làm avt cũng được

Anh chị nào hiểu giúp em chỉ 1 bài này thôi ak giúp em với dc ko e sẽ vote ngay câu trlhn nè NHA NHA

X)-Choose the item among A, B, C or D that best answers the question about the passage. The country is more beautiful than a town and more pleasant to live in. Many people think so, and go to the country for the summer holidays though they cannot live there all the year round. Some have a cottage built in a village so that they can go there whenever they can find the time. English villages are not all alike, but in some ways they are not very different from one another. Almost every village has a church, the round or square tower of which can be seen from many miles around. Surrounding the church is the church yard, where people are buried. The village green is a wide stretch of grass, and houses or cottages are built round it. Country life is now fairly comfortable and many villages have running water brought through pipes into each house. Most villages are so close to some small towns that people can go there to buy what they can’t find in the village shops. 71. When do city people often go to the country? A. At the weekends. B. All the year round. C. At Christmas. D. The summer holidays. 72. What is the advantage of city people when they have a cottage built in the village? A. They can have their houses rented. B. They can go to the country at weekends. C. They can go to the country whenever they can find the time. D. All are correct. 73. What is the common feature of English villages? A. They have a church. B. They have a church with a tall tower, and a village green. C. They have a village green. D. They have running water. 74. What is NOT mentioned in the life of English villages? A. The village green B. The church C. Running water D. The Internet 75. What can villagers do when their villages are close to small towns? A. They can go there to buy whatever they want. B. They can go there to buy cheaper things. C. They can go there to buy what is not found in the village shops. D. They can go there to buy luxury goods.

1 1 1 __m2 +___m2+1___= ........... 3 3 3

CMR: với a,b là các số âm thì -Nếu a<b thì a ² >b ² -Nếu a ²>b ² thì a<b

︵✿𝙑ẽ✦𝙝ộ✦𝙞𝙙𝙤𝙡✦𝙢ì𝙣𝙝✦𝙣𝙝𝙖✦!‿✿ $𝑽𝒐𝒕𝒆5*+𝒄â𝒖.𝒕𝒓ả.𝒍ờ𝒊.𝒉𝒂𝒚.𝒏𝒉ấ𝒕$

so sánh : 2 và 1+ sqrt(2) giúp em với ạ, em cảm ơn

Put the words in the correct form. 1. Does it make any ___________________________ (DIFFER) to them if we pay by check? 2. The two boys should receive a just punishment. Their ___________________________ (BEHAVE) at the inauguration ceremony was really outrageous. 3. Mutual accusations will get you nowhere. You’d better try to find a more reasonable ___________________________ (SOLVE) to your conflict. 4. The main cause of the current crisis in the party seems to be the deep ___________________________ (DIVIDE) between its members. 5. It’s most ___________________________ (FASHION) among youths these days to spend their free time in the cinema. 6. Cindy and Mike’s close ___________________________ (FRIEND) finally developed into a profound feeling and culminated in their marriage last year. 7. Tom has lost his ___________________________ (CONFIDE) in conventional medicine after many years of unsuccessful treatment and has opted for acupuncture. 8. ‘What’s the ___________________________ (LONG) of this rope?’ - ‘It’s six meters long.’ 9. Mark’s been terribly busy this week. It’s ___________________________ (DOUBT) whether he’ll attend our performance tomorrow. 10. ‘Why didn’t they react to my warning?’ – ‘They might not have understood its discreet ______________________ (MEAN).’