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Problem
If the cost of a 4-minute telephone call is $0.24, then the cost of a 15-minute call at the same rate is:

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Select the Chapter below that corresponds to your math book. Test yourself on hundreds of practice problems. Find step-by-step solutions if you get stuck.

•	Chapter 1: Operations, Expressions, and Variables
•	Chapter 2: Integers
•	Chapter 3: Number Theory
•	Chapter 4: Solving Equations
•	Chapter 5: Rational Numbers
•	Chapter 6: Proportions, Ratios, and Percent
•	Chapter 7: Basic Geometry
•	Chapter 8: Real Numbers and the Pythagorean Theorem
•	Chapter 9: Area and Volume
•	Chapter 10: Linear Equations