Now answer the questions. a. How long have you been studying English? b. I have been studying English for twenty years. c. I have been studying English since 2004 .

\( \lim _{x \rightarrow 0} () \)

\( 1 = 3 \sqrt { x } \cdots 3 \)

An athlete trains on a circular track of radius 50 m a jogs 8 laps each day, 5 days a week. How far does athlete jog each week? Round your answer to the nearest metre.

กำหนดให้ \( A=\left[\begin{array}{rrr}2 & -3 & -1 \\ 4 & 0 & 5 \\ -1 & 0 & 1\end{array}\right] \) \( a_{21}+a_{13}-a_{32} \) มีค่าตรงกับข้อใดต่อ ไปนี้

Some students were tasked to make carame cornflakes. They were told to mix honey, sugar and butter in the ratio of 1:1:2 The amount of caramel and cornflakes was 1:1 What is the ratio for the amount of sugar to the amount of cornflakes?