英文的数学翻译并解答!(在线等)
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英文的数学翻译并解答!(在线等)
1 last year the enrollment in a kindergarten was 150 pupils. this year the enrollment is 180 pupils .what was the percent of the increase in enrollment A 10% B 15% C 20% D 25% E 30%
2 the dimensions of a room are ; l=15feet,w=12feet,and h=8feet.how many square feet of wallpaper will be requored to cover the walls of this roo,?A192sq.ft B 216sq.ft c 240sq.ft D 432sq.ft E 648sq.ft 要解答过程1谢谢!
1 last year the enrollment in a kindergarten was 150 pupils. this year the enrollment is 180 pupils .what was the percent of the increase in enrollment A 10% B 15% C 20% D 25% E 30%
2 the dimensions of a room are ; l=15feet,w=12feet,and h=8feet.how many square feet of wallpaper will be requored to cover the walls of this roo,?A192sq.ft B 216sq.ft c 240sq.ft D 432sq.ft E 648sq.ft 要解答过程1谢谢!
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1.去年一家幼儿园的在册学生数为150人,今年注册数是180人,问注册增长数是多少百分比?
用今年比去年的增量 除以去年的数量 为今年比去年增长的百分比:
180-150=30
30/150=20%
2.一个房间各个维度的尺寸分别是:长15英尺,宽12英尺,高8英尺,问题是需要用多少平方英尺的墙纸才可以把这个房间布置好.
基本是算表面积,但是墙纸不需要铺在地上,于是是算5面的面积:
15*12+12*8*2+15*8*2=612
呵呵 但很遗憾 得数选项中没有 所以题意可能天花板不贴墙纸 于是答案是432
用今年比去年的增量 除以去年的数量 为今年比去年增长的百分比:
180-150=30
30/150=20%
2.一个房间各个维度的尺寸分别是:长15英尺,宽12英尺,高8英尺,问题是需要用多少平方英尺的墙纸才可以把这个房间布置好.
基本是算表面积,但是墙纸不需要铺在地上,于是是算5面的面积:
15*12+12*8*2+15*8*2=612
呵呵 但很遗憾 得数选项中没有 所以题意可能天花板不贴墙纸 于是答案是432