英語(yǔ)翻譯
answer the whole of this question on a piece of graph paper.
the coordinates of the point A,B,C are (1,2),(2,2),(3,0)respectively.given that the triangle ABC is mapped onto triangle XYZ by means of an enlargement with center at origin an scale factor 2.then the triangle XYZis mapped onto triangle RST under a reflection in the line y=1.write down the coordinates of the points R,S,T.
還有一題看不懂:
express:(a)136.80kg correct to the nearest 10kg
(b)0.06280 in standard form,correct to 2 significant figures.
ans:(a)_____________
(b)_____________