Mr. dela Cruz encourages his students to solve Math problems fast and with accuracy. He observed in his Math class that the time it takes a student to solve x word problems is defined by the function (?) = ??? − ? where f(x) is in minutes. Find the average rate of change in solving time from 3 to 5-word problems. A. 5 minutes/problem C. 13 minutes/problem B. 20 minutes/problem D. 23 minutes/problem

College Algebra
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ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter3: Polynomial And Rational Functions
Section3.1: Quadratic Functions And Models
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1. Mr. dela Cruz encourages his students to solve Math problems fast and with accuracy. He observed in his Math class that the time it takes a student to solve x word problems is defined by the function (?) = ??? − ? where f(x) is in minutes. Find the average rate of change in solving time from 3 to 5-word problems.
A. 5 minutes/problem C. 13 minutes/problem
B. 20 minutes/problem D. 23 minutes/problem

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