MAthz F.2 (before 3:00 p.m plz)

2008-08-31 9:55 pm

1) A theatre is designed to accommodate at least 500 audiences and there are 15 seats each row.
(a) What si the least number of rows in the theatre ?
(b)using the result in (a). If three seats are added each row, can the theatre accommodate 600 audiences.

更新1:

X > -2 X^2 ? (-2)^2

回答 (1)

Memento Mori

2008-08-31 10:07 pm

✔ 最佳答案

1(a)
The least number of the rows
= 500 / 15
=33.3333333
所以,We need at least 34 rows in the theartre

1(b) Added 3 seats in each row , so there will be 18 seats in each row,
Numbers of seats
= 18 x 34
=612 seats
所以, If three seats are added each row, the theatre can accommodate 600 audiences

希望幫到您.
應該沒錯吧,

2008-08-31 15:40:58 補充：
x大過-2,
即是說x有可能是-1,0,1,2,3,4,5,6,7,8, 無限多個數,
x^2 亦可是
(-1)^2 =1
(0) ^2 = 0
(1)^2 =1
(2)^2= 4

有很多的可能性喔,
若果能打埋條問題出來會更易解答哦,

參考: 自已,

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