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OpenStudy (anonymous):
The cost per minute of a conference phone call, originally $2.80, increased by 20%. What is the new price? A. $3.00 B. $3.20 C. $3.26 D. $3.36
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OpenStudy (anonymous):
$2.80 + 20% = 2.80 + .56 = D
OpenStudy (anonymous):
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