Difference between revisions of "2011 AMC 10A Problems/Problem 1"
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== Solution == | == Solution == | ||
| + | <math>30.5-30 = .5</math> hours which is <math>30</math> minutes. <math>30*10=300</math> cents which is <math>3</math> dollars. <math>100*.05=5</math> dollars. So finally <math>20+3+5=28</math> dollars. <math>\longrightarrow \boxed{\textbf{D}}</math> | ||
Revision as of 19:20, 10 February 2011
Problem 1
A cell phone plan costs 
each month, plus 
¢ per text message sent, plus 
¢ for each minute used over 
hours. In January Michelle sent 
text messages and talked for 
hours. How much did she have to pay?
Solution
hours which is minutes. 
cents which is 
dollars. 
dollars. So finally 
dollars. 
