2. A dog's hair has been cut and is now getting longer by 1.04 mm each day. With winter coming on, this rate of hair growth is steadily increasing, by 0.132 mm/day every week. By how much will the dog's hair grow during 5 weeks?
(A) 12.0 mm
(B) 24.0 mm
(C) 36.0 mm
(D) 48.0 mm
(E) 60.0 mm

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詳解 (共 1 筆)

#7427046
所以這題初速率為1.04
末速率為1.04+0.132*5=1.70
所以平均速率為初速率+末速率/2
然後總時間是35天
所以再相乘35可以得到
48.0mm
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