2. A decision at the margin Jake is a hard-working college sophomore. One Tuesday, he decides to work nonstop until he has answered 110 practice problems for his economics course. He starts work at 8:00 AM and uses a table to keep track of his progress throughout the day. He notices that as he gets tired, it takes him longer to solve each problem. Time Total Problems Answered 8:00 AM 0 9:00 AM 50 10:00 AM 80 11:00 AM 100 Noon 110 Use the table to answer the following questions. The marginal, or additional, gain from Jake’s first hour of work, from 8:00 AM to 9:00 AM, is problems. The marginal gain from Jake’s third hour of work, from 10:00 AM to 11:00 AM, is problems. Later, the teaching assistant for Jake’s economics course gives him some advice. “Based on past experience,” the teaching assistant says, “working on 25 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 his 4 hours of study time to get the best exam score possible, how many hours should he spend working on problems and how many should he spend 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 4 hours working on problems, 0 hours 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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2. A decision at the margin

Jake is a hard-working college sophomore. One Tuesday, he decides to work nonstop until he has answered 110 practice problems for his economics course. He starts work at 8:00 AM and uses a table to keep track of his progress throughout the day. He notices that as he gets tired, it takes him longer to solve each problem.

Time	Total Problems Answered
8:00 AM	0
9:00 AM	50
10:00 AM	80
11:00 AM	100
Noon	110

Use the table to answer the following questions.

The marginal, or additional, gain from Jake’s first hour of work, from 8:00 AM to 9:00 AM, is

problems.

The marginal gain from Jake’s third hour of work, from 10:00 AM to 11:00 AM, is

problems.

Later, the teaching assistant for Jake’s economics course gives him some advice. “Based on past experience,” the teaching assistant says, “working on 25 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 his 4 hours of study time to get the best exam score possible, how many hours should he spend working on problems and how many should he spend 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

4 hours working on problems, 0 hours reading

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