PP-T1-38

[max999]

A certain business produced x rakes each month from November through February and shipped 0.5x rakes at the beginning of each month from March through October. The business paid no storage costs for the rakes from November through February, but it paid storage costs of $0.10 per rake each month from March through October for the rakes that had not been shipped. In terms of x, what was the total storage cost, in dollars, that the business paid for the rakes for the 12 months from November through October?
(A) 0.40x (B) 1.20x (C) 1.40x (D) 1.60x (E) 3.20x
Ans: C

[amyliang]

form March to Oct. the stock is 4x,3.5x....every month reduces 1/2x
then, sum up the stocks from march to Oct.will be x(4+3.5+3+2.5.....)X0.1 is the answer

[max999]

謝謝amyliang

[max999]

form March to Oct. the stock is 4x,3.5x....every month reduces 1/2x
then, sum up the stocks from march to Oct.will be x(4+3.5+3+2.5.....)X0.1 is the answer

再請問
是x(4+3.5+3+2.5+2+1.5+1+0.5)*0.1=1.8 ?

請問那裡算錯了阿?

[chris720503]

注意題目的講法： at the beginning of each month
所以3月份要先扣掉 0.5X，亦即從（3.5+3.0+2.5+2.0+1.5......+0）

[edas9101]

可是怎嚜知道從3.6開始扣呢??
感恩