Cho is a hard-working college freshman. One Tuesday, she decides to work nonstop until she has answered 154 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 8:00 AM 9:00 AM 10:00 AM 11:00 AM Noon Total Problems Answered 0 70 112 140 154
Cho is a hard-working college freshman. One Tuesday, she decides to work nonstop until she has answered 154 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 8:00 AM 9:00 AM 10:00 AM 11:00 AM Noon Total Problems Answered 0 70 112 140 154
Chapter1: Making Economics Decisions
Section: Chapter Questions
Problem 1QTC
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Transcribed Image Text:Cho is a hard-working college freshman. One Tuesday, she decides to work nonstop until she has answered 154 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
8:00 AM
9:00 AM
10:00 AM
11:00 AM
Noon
Total Problems Answered
0
70
112
140
154
Use the table to answer the following questions.
The marginal, or additional, gain from Cho's second hour of work, from 9:00 AM to 10:00 AM, is
The marginal from Cho's fourth hour of work, from 11:00 AM to
is
problems.
O 0 hours working on problems, 4 hours reading
O 1 hour working on problems, 3 hours reading
O 2 hours working on problems, 2 hours reading
O 3 hours working on problems, 1 hour reading
O 4 hours working on problems, 0 hours reading
problems.
Later, the teaching assistant for Cho's math course gives her some advice. "Based on past experience," the teaching assistant says, "working on
35 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 spend working
on problems and how many should she spend reading?
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