Hằng ngày ông Thắng đều đi xe buýt từ nhà đến cơ quan. Dưới đây là bảng thống kê thời gian của $100$ lần ông Thắng đi xe buýt từ nhà đến cơ quan.

Thời gian (phút)	Số lần
$[15;18)$	$22$
$[18;21)$	$38$
$[21;24)$	$27$
$[24;27)$	$8$
$[27;30)$	$4$
$[30;33)$	$1$

Khoảng tứ phân vị của mẫu số liệu ghép nhóm trên (làm tròn đến hàng phần trăm) bằng

Bảng mã ASCII mở rộng có bao nhiêu ký tự?

Choose A, B, C or D to answer the question.

You’ve noticed that whenever you take a cold drink out of the refrigerator, water droplets form on the outside of the glass. What is the likely cause?

Tín hiệu tương tự có dạng hình sin là tín hiệu được

Read the following advertisement and mark the letter A, B, C, or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 1 to 6.

During the 1960s and '70s, industrialised countries suffered a(n) ______(1), and violent crimes such as muggings increased at an alarming rate. What is more, it was expected to ______(2) worse. Only it didn't. Instead, it got much, much better. In the 1990s, crime started to fall dramatically, and today it is down by almost 50% across the industrialised world and continues to fall. Triumphant politicians will assert that their policies have cut crime. Actually______(3) of the country's policies, the trend does coincide ______(4) the use and subsequent prohibition of tetraethyl lead in petrol, ______(5) for years as a cause of aggressive behaviour. Therefore, countries that still use leaded petrol are being urged to stop ______(6) it to help improve health and crime prevention.

Để chuyển đổi đơn vị số đo một góc từ rad (radian) sang độ và ngược lại, từ độ sang rad, hệ thức nào sau đây không đúng?

Mark the letter A, B, C or D to indicate the best arrangement of utterances or sentences to make a meaningful exchange or text in each of the following questions from 13 to 17

a. These small ships, which usually measured about seventy feet long and sixteen feet wide, had oars and single sails.

b. These brave warriors came from Norway, Sweden, Denmark, and Iceland.

c. They learned to make strong boats that could travel long distances over the seas.

d. Several hundred years before the voyages of Columbus, America was visited by men called Vikings.

e. Many of them were good sailors and made long voyages.

Tìm tất cả các giá trị của tham số \(m\) để bất phương trình \(x^{2}-(m+2) x+8 m+1 \leq 0\) vô nghiệm.

Vùng có số lượng đàn bò thịt phát triển nhất ở nước ta là

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

John said, “You’d better not lend them any money, Daisy.”

Read the following passage about women in the workplace and mark the letter A, B, C, or D on your answer sheet to indicate the option that best fits each of the numbered blanks from 18 to 22.

Marcel Bich, a French manufacturer of traditional ink pens, was the man (18) ______. Bich was surprised by the poor quality and high price of the ballpoint pens available at the time. However, he realised that the ballpoint pen was a well-established invention, (19) ______ that would succeed in the market.

"Bich approached the Biro brothers and asked for permission to use their original invention in one of his pens. In return, he offered to pay them for each pen he sold. (20) ______, he used a microscope to examine them closely."

By 1950, he was ready to introduce his new design: a plastic pen with a transparent barrel that wrote smoothly, didn’t leak, and cost only a few cents. The new ballpoint pen (21) ______. The public liked it immediately, and today it is as common as the pencil.

Bich's success allowed him to establish Société Bic, which expanded worldwide. (22) ______, producing not only pens but also lighters, razors, and even mobile phones.

Hoạt động nào sau đây không phải hoạt động sản xuất?

Để xem xét khả năng tiết kiệm điện của thiết bị hay đồ dùng điện, cần chú ý đến thông tin thể hiện trên nhãn

Đối với hệ thống khí canh, máng trồng cây là:

Cho 8 bạn học sinh \(A, B, C, D, E, F, G, H\) hỏi có bao nhiêu cách xếp 8 bạn đó ngồi quanh một bàn tròn có 8 chiếc ghế?