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21.有一個截面圖形為二次函數的碗,盛水高1公分時,液面寬度 為6公分,試問若液面寬 為 12公分時,盛水高為多少公分? (A)2 (B)3 (C)4 (D)6
問題詳情
21.有一個截面圖形為二次函數的碗,盛水高1公分時,液面寬度
為6公分,試問若液面寬
為 12公分時,盛水高為多少公分?
(A)2
(B)3
(C)4
(D)6
參考答案
答案:C
難度:
計算中
-1
書單:
沒有書單,新增
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此函數為y=ax2,將D(3,1)代入可★1=9☆,☆...
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20.一顆棒球被擊出之後,離打擊點水平距離x公尺時,球離地面高度y公尺。若x與y的關係式為y=-0.001x2+0.07x+1.8,試問球在擊出後幾公尺處落地?(A) 70 (B) 80 (C) 90
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22.某商品的原定價為每件40元,每星期可以賣出150件。如果調漲價格1元,則每個星期就會少賣3件;如果調降價格1元,則每個星期就會多賣3件, 已知該商品每件的成本為20元。問經最適當調整後每星期全部
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23.二次函數y=21x2-36x+3的圖形與下列哪一個方程式的圖形沒有交點? (A)x=500 (B)x=-500(C)y=500 (D)y=-500
24.有21位遊客參加溪頭之旅,他們年齡的次數分配表如下。已知這群遊客年齡的中位數是33歲,則何者正確? (A) a=6 (B) a=7 (C) b=6 (D) b=5
25.附圖為二次函數y=( x+1 )2+5的圖形,若在第一象限有一點P( a , b )在此二次函數上,且與原點及Q(6 ,0) 所圍成的△OPQ面積為S,若S=162,則a+b=? (A)60
101.液壓煞車之煞車主缸回油孔如果阻塞,會使煞車咬住。(A)O(B)X
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【題組】18. Your hands are dirty, but there is no soap and water. What can you do?(A) Use hand sanitizer
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【題組】21. What was an obstacle(阻礙) that Amelia faced in her around the world flight?(A)She was a femal
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【題組】24. Which is likely another example of a “hot zone”?(A) An island with very humid weather. (B) A
【題組】25. Which of the following statements is likely true about Doctors Without Borders?(A) It operat