-Approximation and Eorrors
significant figures
18. An athlete can finish a 400m race in 1minute 23seconds.Try to change the unit of that time to minutes and correct the answer to3 significant figures.
點做呢?
可不可以有中文解釋一下講咩個題目?
用英文的方式作答.
42.由於蒸發的關係,某水池的水位每2小時下降0.5cm.
在早上10時,池水的深度是1m.
a) (i) 試以有向數表示池水在1小時內下降的幅度.
(ii)由此,計池水在早上11時的深度.