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tatuchka [14]
3 years ago
14

For her phone service, Kala pays a monthly fee of $13 , and she pays an additional $0.05 per minute of use. The least she has be

en charged in a month is $63.15 . What are the possible numbers of minutes she has used her phone in a month? Use m for the number of minutes, and solve your inequality for m .
Mathematics
1 answer:
tester [92]3 years ago
6 0
The inequality would be 0.05m + 13 >= 63.15. Solving:
0.05m >= 50.15

m >= 1003 minutes

Therefore at least 1003 minutes were consumed to be billed $63.15 or more.

Hope this helps.
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In 2009 there was an endangered population of 270 cranes in a western state. Due to wildlife efforts, the population is increasi
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Assuming compount interest format

A=P(r+1)^t for compounded per 1 year
A=future amount
P=present amount
r=rate in decimal
t=time in years


given
P=270
r=5%=0.05

the equaton is
A=270(0.05+1)^t or
A=270(1.05)^t
for any year, 2009, is year 0, so if you wanted to input the year then
A=270(1.05)^{t-2009} would be for t=what year it was

A. f(x)=270(1.05)^t


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3 years ago
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