Ginny is a hard-working college senior. One Sunday, she decides to work nonstop until she has answered 150 practice problems for her math course. She starts work at 8:00 AM and uses a table to keep track of her progress throughout the day. She notices that as she gets tired, it takes her longer to solve each problem. Time Total Problems Answered 8:00 AM 0 9:00 AM 60 10:00 AM 105 11:00 AM 135 Noon 150 Use the table to answer the following questions. The marginal, or additional, gain from Ginny’s second hour of work, from 9:00 AM to 10:00 AM, is problems. The marginal gain from Ginny’s fourth hour of work, from 11:00 AM to noon, is problems. Later, the teaching assistant in Ginny’s math course gives her some advice. “Based on past experience,” the teaching assistant says, “working on 52.5 problems raises a student’s exam score by about the same amount as reading the textbook for 1 hour.” For simplicity, assume students always cover the same number of pages during each hour they spend reading. Given this information, in order to use her 4 hours of study time to get the best exam score possible, how many hours should she have spent working on problems, and how many should she have spent reading? 0 hours working on problems, 4 hours reading 1 hour working on problems, 3 hours reading 2 hours working on problems, 2 hours reading 3 hours working on problems, 1 hour reading

ENGR.ECONOMIC ANALYSIS

14th Edition

ISBN:9780190931919

Author:NEWNAN

Publisher:NEWNAN

Chapter1: Making Economics Decisions

Section: Chapter Questions

Problem 1QTC

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Ginny is a hard-working college senior. One Sunday, she decides to work nonstop until she has answered 150 practice problems for her math course. She starts work at 8:00 AM and uses a table to keep track of her progress throughout the day. She notices that as she gets tired, it takes her longer to solve each problem.

Time	Total Problems Answered
8:00 AM	0
9:00 AM	60
10:00 AM	105
11:00 AM	135
Noon	150

Use the table to answer the following questions.

The marginal, or additional, gain from Ginny’s second hour of work, from 9:00 AM to 10:00 AM, is

problems.

The marginal gain from Ginny’s fourth hour of work, from 11:00 AM to noon, is

problems.

Later, the teaching assistant in Ginny’s math course gives her some advice. “Based on past experience,” the teaching assistant says, “working on 52.5 problems raises a student’s exam score by about the same amount as reading the textbook for 1 hour.” For simplicity, assume students always cover the same number of pages during each hour they spend reading.

Given this information, in order to use her 4 hours of study time to get the best exam score possible, how many hours should she have spent working on problems, and how many should she have spent reading?

0 hours working on problems, 4 hours reading

1 hour working on problems, 3 hours reading

2 hours working on problems, 2 hours reading

3 hours working on problems, 1 hour reading

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