中二數學問題求幫忙(10點)－hzb53jl55v的部落格

標題:

中二數學問題求幫忙(10點)

發問:

Approximation and ErrorsFind the Relative Percentage Maximum error error absolute errorMeasured value 20m(correct to nearest m) ... 顯示更多 Approximation and Errors Find the Relative Percentage Maximum error error absolute error Measured value 20m(correct to nearest m) 48.2g(correct to 1 decimal place) $420(correct to the nearest ten) 53.0cm^2(correct to 3 significant figures) 0.18(correct to the nearest 0.01) find the upper limit and lower limit Numbers 617000(correct to the nearest thousand) 28.16(correct to 2 decimal places) 0.028(correct to 2 significant figures) plz help me!!! 更新: 有睇吾明的地方可以問!!! 知道答案的plz help!!!!!

最佳解答:

此文章來自奇摩知識+如有不便請留言告知

U need 2 find relative error, percentage error, absolute error and maximum absolute error? 20m(correct to nearest m) Absolute error=20-19.5 =0.5m Maximum absolute error=1/2 =0.5m Relative error= 0.5/20 =0.025 Percentage error=0.025x100% =2.5% 48.2g(correct to 1 decimal place) Absolute error=48.2-48.15 =0.05g Maximum absolute error=0.1/2 =0.05g Relative error= 0.05/48.2 =0.001 (correct to 3 decimal place) Percentage error=0.001x100% =0.1% $420(correct to the nearest ten) Absolute error=420-415 =$5 Maximum absolute error=10/2 =$5 Relative error=5/420 =1/84 Percentage error=1/84x100% =1/4/21% or (25/21%) 53.0cm^2(correct to 3 significant figures) Absolute error=0.1/2 =0.05cm^2 Maximum absolute error=0.1/2 =0.05cm^2 Relative error=0.05/53.0 =1/1060 Percentage error=1/1060x100% =5/53% 0.18(correct to the nearest 0.01) Absolute error=0.01/2 =0.005 Maximum absolute error=0.01/2 =0.005 Relative error=0.005/0.18 =1/36 Percentage error=1/36x100% =2/7/9% or (25/9%) 617000(correct to the nearest thousand) Maximum absolute error=1000/2 =500 Upper limit=617000+500 =617500 Lower limit=617000-500 =616500 28.16(correct to 2 decimal places) Maximum absolute error=0.01/2 =0.005 Upper limit=28.16+0.005 =28.165 Lower limit=28.16-0.005 =28.155 Not enough words 2 type the last... 2012-08-08 23:25:20 補充： The last one: 0.028(correct to 2 significant figures) Maximum absolute error=0.001/2 =0.0005 Upper limit=0.028+0.0005 =0.0285 Lower limit=0.028-0.0005 =0.0275 Remember if u want people 2 ans many questions, can add more points ar~

其他解答: