✔ 最佳答案
1)1000 , 1100 , 0.99999 等數字均可符合這一問題的要求,請問這一條問題是否有遺漏的地方?
2)這一條問題應該不是問可能實際重量,而是實際重量的可能「範圍」。
因為單位為kg,所以最大誤差為0.5kg
設蘋果的重量範圍為x kg
47.5 =< x < 48.5
3)她所需的步行時間= 2.1 km / (1.5m/s)
= 2100 m / ( 1.5m/s )
= 1400 s
= 23 min + 20s
8h - 23 min - 20 s = 7h + ( 59min - 23 min ) + ( 60s - 20s )
= 7h + 36 min + 40 s
她於7時36分40秒前出門便不會遲到
4)四年後本行和 = $40000 + $40000 * 7% * 4
= $40000 + $400 * 7 * 4
= $40000 + $11200
= $51200
5)現在的價值 = $300000 * ( 1 - 20% )^4
= $300000 * 0.8^4
= $300000 * 0.64 * 0.8 * 0.8
= $300000 * 0.512 * 0.8
= $300000 * 0.4096
= $40960 * 3
= $122880
6)十年後本利和 = $2000 * ( 1 + 1% )^10
= $2000 * 1.1^10
= $2000 * 1.331 * 1.1^7
= $2000 * 1.4641 *1.1^6
= $2000 * 1.61051 * 1.1^5
= $2000 * 1.771561 * 1.1 ^4
= $2000 * 1.9487171 *1.1^3
= $2000 * 2.5937424601
= $5187.4849202