式連答案呀
1.Given that the area of a circle is 40 cm2 , David estimates that the radius of the circle is between 3 cm and 4 cm. Is his estimation correct?
2.To get promotion, a student is required to obtain mark of 500 or more in ten subjects. Philip is F.1 student, his marks in ten subject are show below:
65 51 43 42 77 41 54 33 61 62
Estimate whether Philip can promote to F.2.
中一數學題(兩條就＋分la)
2008-03-04 2:26 am
回答 (2)
2008-03-04 3:14 am
✔ 最佳答案
Radius:√40÷π
=3.57(3sign.fig.)
3.57 is between 3 and 4.
∴He is correct.
Round off the ten numbers:
70,50,40,40,80,40,50,30,60,60
70+50+40+40+80+40+50+30+60+60=520
520 is greater than 500
∴He can promote to F2.
2008-03-03 19:15:53 補充：
1樓果位只係加齊10個數，未曾有Estimate，咁樣答F1卷，第2題必得0分
參考: Myself
2008-03-04 3:05 am
1.
丌r²=40
r²=12.73
r=3.568
佢係岩ge
2.
佢可以啊
因為500或以上可以promote嘛
10個數加埋大過500
所以可以promote
丌r²=40
r²=12.73
r=3.568
佢係岩ge
2.
佢可以啊
因為500或以上可以promote嘛
10個數加埋大過500
所以可以promote
參考: 自己
收錄日期: 2021-04-23 23:00:20
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080303000051KK01829