阿輕嫂 發問時間: 社會與文化語言 · 1 0 年前

微積分應用題目

A bus company has adopt the following pricing policy for groups that wish to charter its buses. Group containing no more than 40 peopel will be charged a fixed amount of $2400(40 times $60).In groups containing between 40 and 80 people, everyone will pay $60 minus 50cents for each person in excess of 40. The company's lowest fare of $40 per person will be offered to groups that have 80 members or more . Express the bus company's revenue as a function of the size of the group.

想要問方程式列法跟原因

尤其是40~80人= =

已更新項目:

可是詳解寫40~80人

式子是R=x(80-0.5x)

2 個已更新項目:

好像一樣的意思

3 個已更新項目:

為什麼少於40人跟多過80人要這樣

少於40人都賺2400

不知道題目在問啥= =

1 個解答

評分
  • 1 0 年前
    最佳解答

    Lets x be the number of people,

    x <= 40

    Revenue = $2400

    40 < x < 80

    Revenue = (60 - (0.05 * (x - 40))) * x

    example: if x=50, Revenue = (60 - (0.05 * (50-40))) * 50 = $2975

    x >= 80

    Revenue = 40x

    example: if x=100, Revenue = 40 * 100 = $4000

    2007-10-19 04:45:49 補充:

    我看錯了.... 0.05 --> 0.5

    40 < x < 80

    Revenue = (60 - (0.50 * (x - 40))) * x

    example: if x=50, Revenue = (60 - (0.50 * (50-40))) * 50 = $2750

    2007-10-19 04:50:47 補充:

    少於40人, 定格 = $2400

    40-80人有折扣. 大家將支付$60 - $0.50

    example:

    41人, 每人60-0.5*(41-40) = 59.5

    42人 = 每人 60-0.5*(42-40) = 60 - 1 = 59

    .

    .

    因此 x人 = 每人 60- (0.5 * (x -40))

    超過80, 每人 $40

    2007-10-21 14:14:45 補充:

    Group containing (no more than 40 peopel)=(少於40人) will be (charged a fixed amount of $2400) = (定格 = $2400)

    2007-10-21 14:14:55 補充:

    In groups containing between (40 and 80 people)=(40-80人), (everyone will pay)=(每人將支付) ($60 minus 50cents)=($60-$0.5) for (each person in excess of 40)=(當超過40人).

    The company's lowest fare of ($40 per person)=(每人 $40) will be offered to groups that (have 80 members or more)=(超過80人) .

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