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cell phone bill - calculation of charges - Algebra

by Blake
(Montgomery Alabama, USA)










































Your monthly cell phone bill is determined by a fixed monthly fee of $35 for 300 anytime minutes and $.40 for each additional minute used.
Dependent variables can be the result of more than one independent variable. Consider your phone bill as presented above. Aside from being charged for minutes over 300, you are charged $1.25 for each directory assistance call and $.75 per minute for long distance roaming calls. You also have to contribute at least $1.50 to the federally required Universal Service Fund per month and this value may vary on your phone bill but is not an independent variable.
1. The constant in the closing question is?
1)Long distance roaming
2) Additional minutes used
3) Fixed monthly fee
4) Directory assistance

Comments for cell phone bill - calculation of charges - Algebra

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Jun 14, 2012
cell phone bill - calculation of charges
by: Staff



Answer:



d = number of directory assistance calls

t = call time in minutes

r = time, roaming calls


≤ 300 anytime minutes

Cost = 35 + 1.25d + .75r + 1.50 (varies)

> 300 anytime minutes
Cost = 35 + .4t + 1.25d + .75r + 1.50 (varies)



There are several constants:

$35 monthly fee

$.40 for each minute over 300 minutes

$.75 for each minute of long distance roaming calls

$1.25 for each directory assistance call


There is NO CLOSING QUESTION LISTED in the problem statement. If you have that closing question, add a comment to this post with the question.



Thanks for writing.

Staff
www.solving-math-problems.com



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