Bunuel
Listed above are the rates for operator-assisted telephone calls from San Diego to New York City. On a Friday at 4:17 p.m., Mr. Talbot made a person to-person phone call from San Diego to New York City. When he received his monthly phone bill, Mr. Talbot noted that this call cost $14.09. To the nearest minute, how long did this call last?
A. 23
B. 24
C. 25
D. 26
E. 27
Attachment:
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Hi,
The Q clearly asks for intensive calculations as shown in above reply..
Quote:
2.97 + 0.46x = 14.09
x = 24.391
..
I would recommend a slightly easier and lesser error prone method of calculations as it will not include div by .46 etc..
first three minutes= 4.35 and there after .46 per minute..
let me break 14.09..
bill beyond three minutes=14.09-4.35=9.74..when you look at .46, we should realize 20 times that amount is 9.2..
so he could have spoken for 20 minutes more easily..
so after 3+20=23 minutes, money left=9.74-9.2=.54...54 is clearly very close to .46, so another minute..
answer = 23+1=24 minutes..
B..
NOTE:- method is same but by breaking into minutes, it becomes much simpler, avoiding div by numbers of the shape of .46