Re: [計量] For a certain farm, soybean ...
※ 引述《Anlorus ()》之銘言：
: 真是很謝謝大家的幫忙
: 以下幾題，得請教大家了
: 1.For a certain farm, soybean production increased
: by 25 percent from year X to year Y,
: and the selling price of soybeans decreased by 25 percent
: from year X to year Y. If the entire soybean production was sold each year,
: approximately what was the percent change in the revenues
: from the sale of the soybeans from year X to year Y?
: (A) 56% decrease
: (B) 6% decrease
: (C) No change
: (D) 6% increase
: (E) 56% increase
: 答案為 B
$ * (5/4) * (3/4) =$ * 15/16
少 1/16 約 6%
: 3.David and Michael charged Mr. Jimenez $3,000 to remodel his basement.
: To complete the project, David worked 4 days alone,
: Michael worked 1 day alone, and they worked 10 days together.
: If they each received the same amount of money for each day that they worked,
: how much of the $3,000 did David receive?
: (A) $1,800
: (B) $1,750
: (C) $1,680
: (D) $1,575
: (E) $1,200
: 答案為 C
X * (4+10) + X * (1+10) = 3000
X = 120
David = (4+10) *120 =1680
: 4.Workers at Companies X and Y are paid the same base hourly rate.
: Workers at company X are paid 1.5 times the base hourly rate for
: each hour worked per week in excess of the first 37,
: while workers at Company Y are paid 1.5 times the base hourly rate
: for each hour worked per week in excess of the first 40.
: In a given week, how many hours must a Company X worker work in order to
: receive the same pay as a company Y worker who works 46 hours?
: (A) 46
: (B) 45
: (C) 44
: (D) 43
: (E) 42
: 答案為 B
設Hours為H
(H-37)* 1.5$ + 37*$ = 6 *1.5 $ + 40*$
H =45
: 5. If the cube of n is 180 greater than the square of n, then n =
: (A) 10
: (B) 9
: (C) 8
: (D) 7
: (E) 6
: 答案為 E
n^3 - n^2 =180
n=6
: 6. A developer has land that has x feet of lake frontage.
: The land is to be subdivided into lots,
: each of which is to have either 80 feet or 100 feet of lake frontage.
: If of the lots are to have 80 feet of frontage each and
: the remaining 40 lots are to have 100 feet of frontage each,
: what is the value of x?
: (A) 400
: (B) 3,200
: (C) 3,700
: (D) 4,400
: (E) 4,760
: 答案為 D
這個是不是少打數字...
: 再次謝謝大家！
: 呼～祝福明天要上場的大家，都能大順利啊！！！
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