a). A 9-page letter would have its 1st page as the fancy letter head and 8 pages of regular stationery.
Therefore, the stationery cost alone for a 9-page letter is 1*0.16+8*0.05 = $ 0.56.
(b). If the secretary spands 4 hours on typing and corrections, then the amount payable to the secretary is 4* $ 6.75 = $ 27.00. On adding the cost of the envelope and the stationery, the total cost of preparing and mailing the letter is $ 0.56 + $ 0.42+$ 27 = $ 27.98.
( c). If c is the cost in dollars of the stationery and if p is the number of pages, then c(p) = 0.16+(p-1)*0.05 = 0.16+0.05p – 0.05 = 0.05p+0.11. Thus, c(p) = 0.05p+0.11.
( d). Let h be the number of hours spent by the secretary in preparing a p-page letter. Then c(h,p) = 6.75h + 0.42+ 0.05p+0.11= 6.75h+0.05p + 0.53. Thus, c(h,p) = 6.75h+0.05p + 0.53.
(e). The cost of preparing and mailing a 4-page letter which took the secretary 35 minutes of prepare, is 6.75*(35/60)+0.05*4+0.53 = 3.94 +0.20+0.53 = $ 4.67.
Part c, d and e You pay your secretary $6.75 per hour. A stamped envelope costs...
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