下面幾題是今天自己練習出現不會的 都是pp的
但因為我手上的pp 不是破解版 都沒有圖
所以無法知道題目 請版大原諒
(1)
name sales
Ann $450,000
Bob $360,000
Cal $190,000
Dot $210,000
Ed $680,000
The table above shows the total sales recorded in July for the 5 salespeoploe at Acme Truck Sales. IT was discovered that one of Cal's sales was incorrectly recorded as one of Ann's sales. After this error was corrected, Ann's total sales still higher than Cal's total sales, and median of 5 sales total was 330,000.What was the value of the incorrectly recorded sales?
Ans:120,000
(Why?我把它們的sales從小到大排列後,得到的media is 360,000 跟330,000差了30,000。所以我就選答案30,000…那裡想錯了呢??)
2.畫面上是二個三角形,2個三角形的角都一樣,右邊的三角形的面積是左邊三角形的2倍。大三角形的底是S,小三角形的底是s,題目如下
If the area of the triangle on the right is twice of area of the triangle on the lift, then in term of s, S=
Ans:根號2*s
Why???不是1/2???