標題:
MATHS QUESTIONS FORM2
- [問題]股票手續費-
- 急!!4題數獨啦˙20點送了啦
- 從板橋力行新村怎麼到樹林區學成路468號@1@
- 台東縣海端鄉@1@
- 天堂復活捲軸商店只收500為什麼還有人收520
- 我想問一下 AM2主機板的問題和配備！！謝謝
- 上法庭一定要有辯護人嗎？@1@
- 哪個牌子的袋耐用-@1@
- 從蘆洲中正路到輔大公車怎麼搭
- 如何讓 PSP 轉檔的大小可以到480-270@1@
此文章來自奇摩知識+如有不便請留言告知
發問:
q.1 the time taken by a train to go from station A to stationB is 3 minutes 49 seconds. express this time in(a)minutes, correct to 2 significant figures,(b)seconds , correct to 2 significant figures.q.2 the time required for an anti-virus software to scan all the files of the computer is measured by a... 顯示更多 q.1 the time taken by a train to go from station A to stationB is 3 minutes 49 seconds. express this time in (a)minutes, correct to 2 significant figures, (b)seconds , correct to 2 significant figures. q.2 the time required for an anti-virus software to scan all the files of the computer is measured by a programmer to be 19 minutes 15 seconds, correct to the nearest 5 second. find the percentage error of the measured time correct to 2 significant figures.
最佳解答:
1a. 3 minutes 49 seconds =(3 + 49/60) minutes = 3.81666666666... minutes = 3.8 minutes (corr. to 2 sig. fig.) 1b. 3 minutes 49 seconds = (3x60 + 49) seconds = 229 seconds = 230 seconds (corr. to 2 sig. fig.) 2. 19 minutes 15 seconds = (19 x 60 + 15) seconds = 1155 seconds Maximum absolute error = 5 seconds / 2 = 2.5 seconds So percentage error = 2.5 / 1155 x 100% = 0.216450216 % = 0.22% (corr. to 2 sig. fig.)
其他解答:5C926699F268FE02
留言列表
