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Answer:Total time minute Casey can talk= 689 Minute
Step-by-step explanation:Total charges of flat rate per month= $3. 99
Total Additional charge per minute = $0.05
Total monthly bill = $38. 44
Total additional charge=Total monthly bill - Total charge of flat rate
=$38.44-$3.99
=$34.45
Total time minute Casey cann talk=Total additional charge÷Total additional charge per minute
=$34.45÷$0.05
=689 Minute
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689 minutes long If Casey's monthly bill was $38.44, she would talk on her cell phone.
Given;
A cell phone provider charges a set monthly fee of $3. 99 plus an extra $0.05 per minute.
If Casey's monthly phone bill was $38.44, how many minutes did she use?
The total charges of the flat rate per month = $3.99
The total additional charge per minute = $0.05
Total monthly bill = $38.44
Total additional charge = Total monthly bill - Total charge of flat rate
= $38.44 - $3.99
= $34.45
Total time per minute Casey can talk = Total additional charge/Total additional charge per minute
= $34.45 / $0.05
= 689 Minutes
Therefore, for 689 minutes Casey talk on her cell phone if her monthly bill was $38.44
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