# 急英文的數學幫我解答我明天早上要考試謝謝

1.Three boys have marbles in the ratio fo 19:5:3 IF the boy with the least number has a marbles, how many marbles does the boy with the greatest number have ?

2.The area of a circle with radius r is equal to the area of a rectangle with base b .

Find the altitude of the rectangle in terms of r , b and π .

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1.Three boys have marbles in the ratio fo 19:5:3 IF the boy with the least number has A marbles, how many marbles does the boy with the greatest number have ?

三個男孩有一堆彈珠, 其比例為19 : 5 : 3

如果彈珠數最少的男孩有A顆彈珠

則彈珠數最多的男孩會有幾顆?

答 :

設最多者有B顆

最少 : 最多 = 3 : 19 =A :B

19*A = 3*B

B=(19*A)/3顆

2.The area of a circle with radius r is equal to the area of a rectangle with base b .

Find the altitude of the rectangle in terms of r , b and π .

一個半徑為 r 的圓其面積和一個底長為 b的長方型相同

求長方型的高( 用 r , b 和π來表示)

圓面積 = π*(r^2)

設長方型高為 x

π*(r^2) = b * x

則高 x = (π*(r^2))/b

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• 圓週要者怎樣算.....忘了

你還要計算過程喔..............我是數學白吃ㄝ

1.Three boys have marbles in the ratio fo 19:5:3 IF the boy with the least number has a marbles, how many marbles does the boy with the greatest number have ?

三個小鬼有一堆'彈珠'....比例為 19 - 5 - 3 .....如果有一個小果至少有一顆'彈珠'

那麼...有最多'彈珠'的小鬼有幾顆

簡單阿.....3 / 19 除不盡ㄚ........所以說...有最少彈珠的小鬼有3顆

最多的19顆

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