Calculus for Business, Economics, Life Sciences, and Social Sciences (14th Edition)
14th Edition
ISBN: 9780134668574
Author: Raymond A. Barnett, Michael R. Ziegler, Karl E. Byleen, Christopher J. Stocker
Publisher: PEARSON
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Textbook Question
Chapter A.1, Problem 1MP
State the real number property that justifies the indicated statement.
(A) 8+ (3 +y) = (8 + 3) + y
(B) (x + y) + z = z+ (x + y)
(C) (a + b)(x + y) = a(x + y) + b(x + y)
(D) 5xy + 0 = 5xy
(E) If xy = 1, x ≠ 0, then y = 1/x.
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The spread of an infectious disease is often modeled using the following autonomous differential equation:
dI
-
- BI(N − I) − MI,
dt
where I is the number of infected people, N is the total size of the population being modeled, ẞ is a constant determining the rate of
transmission, and μ is the rate at which people recover from infection.
Close
a) (5 points) Suppose ẞ = 0.01, N = 1000, and µ = 2. Find all equilibria.
b) (5 points) For the equilbria in part a), determine whether each is stable or unstable.
c) (3 points) Suppose ƒ(I) = d. Draw a phase plot of f against I. (You can use Wolfram Alpha or Desmos to plot the function, or draw the
dt
function by hand.) Identify the equilibria as stable or unstable in the graph.
d) (2 points) Explain the biological meaning of these equilibria being stable or unstable.
Find the indefinite integral.
Check
Answer:
7x
4 + 1x
dx
Chapter A.1 Solutions
Calculus for Business, Economics, Life Sciences, and Social Sciences (14th Edition)
Ch. A.1 - State the real number property that justifies the...Ch. A.1 - Prob. 2MPCh. A.1 - You intend to give a 20% tip, rounded to the...Ch. A.1 - In Problems 16, replace each question mark with an...Ch. A.1 - Prob. 2ECh. A.1 - Prob. 3ECh. A.1 - In Problems 16, replace each question mark with an...Ch. A.1 - In Problems 16, replace each question mark with an...Ch. A.1 - In Problems 16, replace each question mark with an...Ch. A.1 - In Problems 726, indicate true (T) or false (F)....
Ch. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - Prob. 14ECh. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - Prob. 21ECh. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - In Problems 726, indicate true (T) or false (F)....Ch. A.1 - Prob. 26ECh. A.1 - Prob. 27ECh. A.1 - If uv = 0, does either u or v have to be 0 ?...Ch. A.1 - Indicate whether the following are true (T) or...Ch. A.1 - Indicate whether the following are true (T) or...Ch. A.1 - Prob. 31ECh. A.1 - Give an example of a rational number that is not...Ch. A.1 - Given the sets of numbers N (natural numbers), Z...Ch. A.1 - Prob. 34ECh. A.1 - Indicate true (T) or false (F), and for each false...Ch. A.1 - Indicate true (T) or false (F), and for each false...Ch. A.1 - Prob. 37ECh. A.1 - Repeat Problem 37 for 0.181818 . 37.If c =...Ch. A.1 - Use a calculator to express each number in...Ch. A.1 - Prob. 40ECh. A.1 - In Problems 4144, without using a calculator,...Ch. A.1 - Prob. 42ECh. A.1 - Prob. 43ECh. A.1 - In Problems 4144, without using a calculator,...Ch. A.1 - Sales tax. Find the tax owed on a purchase of...Ch. A.1 - Sales tax. If you paid 29.86 in tax on a purchase...Ch. A.1 - Gasoline prices. If the price per gallon of gas...Ch. A.1 - Prob. 48E
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