Math 115: College Algebra, Fall 2009
Week 9
HOMEWORK #15: Due Tuesday, November
3rd:
Homework is due on my desk before
class begins.
Reading
Assignment:
Read: * Read chapter 8 in the book to remind yourself of
some of the basic ideas.
Reading Questions:
·
What is
scientific notation? Why is it useful?
Try some examples of using scientific notation.
·
What are some
rules for exponents for positive integers?
Why do they make sense?
·
What does a 0
exponent do? Why does that make sense?
·
What does a
negative exponent do? Why does that make
sense?
·
What is an
exponential function? Give a couple
examples of situations that can be modeled using an exponential function.
·
Write some
comments and questions on these sections.
Homework
Assignment:
· Please write on the top
right-hand of your homework how long you spent on this homework—writing your
pen-pal letter, reading and solving problems.
· pp. 290, #18,19,21,23,25
· pp.295-296, #17,24,25
· pp.303, #19-24
· pp.309-310, #13-17
· pp.316-317, #14,15,16,19,20
· pp.325-326, #18,23,24,25,26
· Explain to a couple of
people (roommates, friends, family members) the different possible types of
solutions to a system of linear equations.
For each number of possible solutions, show them examples using algebraic
and graphical representations. Write
down their reactions.
· Find some time to work with
other students in the class to understand chapter 8.
· Work out the following
problem: Suppose that you have a choice of renting a car for a
week between two plans:
Plan A: $200 for the week, plus 20 cents per mile.
Plan
B: $300 for the week, plus 10 cents per
mile.
(a) If you will
drive 150 miles, which plan is better? (b) If you will drive 1400 miles, which
plan is better? (c) Define appropriate variables and model each plan with an
equation. (d) Graph the equations you found in (c). What does the intersection of the two lines
represent in terms of the situation you are modeling?
HOMEWORK #16: Due Thursday, November 5th: to be
turned in on Tuesday (together with additional homework that will be due then)
Homework is due on my
desk before class begins.
Reading
Assignment:
Read: * Reread chapter 8 in the book to remind yourself of some of the basic
ideas.
Read and solve some of the questions in the
midterm review section of the book (pp. 388-392)
Homework
Assignment:
· Please write on the top
right-hand of your homework how long you spent on this homework—writing your
pen-pal letter, reading and solving problems.
· p. 344, #20,21,22,23
· p. 350, #12
· p. 357, #12,13,16, optional:
iv
· p.364, #13, optional: iv
· p.369, #18,19,25
· p.374, #9,13
Back to Reading and
Homework Assignments Back to Math 115
Comments:
pmyers@sandiego.edu