a.
To find: independent and dependent variables and explain it.
a.

Answer to Problem 80E
Independent variable is x and dependent variable is y.
Explanation of Solution
Given:
The table below shows profit y (In thousands of dollars ) of a property maintenances business for each month of 2018 with x= 1 represents January
Month. x | Profit. y |
1 | 25.2 |
2 | 25.6 |
3 | 26.6 |
4 | 28.3 |
5 | 31.5 |
6 | 35.8 |
7 | 32.8 |
8 | 30.1 |
9 | 28.6 |
10 | 26.9 |
11 | 24.5 |
12 | 22.7 |
The independent variable is x and dependent variable is y .
x represents each month of the year 2018 and y represents the profit (In thousands of dollars ) of a property maintenances business.
b.
To find: the domain of each part of
b.

Answer to Problem 80E
Explanation of Solution
Given information:
The mathematical model for the data given in (a) is given by:
The first function has a domain
The second function has a domain
The best method is to graph the data as points and then graph both functions on top of the point. If one function deviates from the points we knew, then those points are not in the domain of that function, and therefore must be in the domain of other function.
The mathematical model can be redefined as:
c.
To find: the value of f(5).
c.

Answer to Problem 80E
f (5)=31.575
Explanation of Solution
Given information:
Calculation:
Since the numbers are represented in 1000’s, the value 31.575 is 31.575×1000=31,575
That is, the total profit in the month of May was 31,575.
d.
To find: the value of f (11).
d.

Answer to Problem 80E
The value of f (11)= 24.630
Explanation of Solution
Given information:
Calculation:
Since the numbers are represented in 1000’s, the value 24.63 is 24.63×1000=24,630
That is , the total profit in the month of November was 24,630.
e.
To compare: the values from the mathematical model and that of actual value.
e.

Answer to Problem 80E
The model fits the data well.
Explanation of Solution
The value of f (5) from the mathematical model is 31.575 and actual data value of f(5) is 31.5
The value of f (11) from the mathematical model is 24.63 and actual data value of f(11) is 24.5
That is, values from mathematical model and actual data values are same.
The model fits the data well.
Chapter 1 Solutions
PRECALCULUS W/LIMITS:GRAPH.APPROACH(HS)
- How to find the radius of convergence for the series in the image below? I'm stuck on how to isolate the x in the interval of convergence.arrow_forwardDetermine the exact signed area between the curve g(x): x-axis on the interval [0,1]. = tan2/5 secx dx andarrow_forwardSet up the partial fraction expansion of the function below. Do not explicitly solve for the variables 5 x²(x − 2)(x − 3)³ (24 - 81)² -arrow_forward
- Draw the triangle and show all the workarrow_forwardsolve these pleasearrow_forwardA factorization A = PDP 1 is not unique. For A= 7 2 -4 1 1 1 5 0 2 1 one factorization is P = D= and P-1 30 = Use this information with D₁ = to find a matrix P₁ such that - -1 -2 0 3 1 - - 1 05 A-P,D,P P1 (Type an integer or simplified fraction for each matrix element.)arrow_forward
- Matrix A is factored in the form PDP 1. Use the Diagonalization Theorem to find the eigenvalues of A and a basis for each eigenspace. 30 -1 - 1 0 -1 400 0 0 1 A= 3 4 3 0 1 3 040 3 1 3 0 0 4 1 0 0 003 -1 0 -1 Select the correct choice below and fill in the answer boxes to complete your choice. (Use a comma to separate vectors as needed.) A basis for the corresponding eigenspace is { A. There is one distinct eigenvalue, λ = B. In ascending order, the two distinct eigenvalues are λ₁ ... = and 2 = Bases for the corresponding eigenspaces are { and ( ), respectively. C. In ascending order, the three distinct eigenvalues are λ₁ = = 12/2 = and 3 = Bases for the corresponding eigenspaces are {}, }, and { respectively.arrow_forwardN Page 0.6. 0.4. 0.2- -0.2- -0.4- -6.6 -5 W 10arrow_forwardDiagonalize the following matrix, if possible. 8 0 6 - 8 Select the correct choice below and, if necessary, fill in the answer box to complete your choice. 8 0 OA. For P= D= 0 3 6 0 B. For P = D= 0 -6 8 0 C. For P = D= 0 - 8 D. The matrix cannot be diagonalized.arrow_forward
- Calculus: Early TranscendentalsCalculusISBN:9781285741550Author:James StewartPublisher:Cengage LearningThomas' Calculus (14th Edition)CalculusISBN:9780134438986Author:Joel R. Hass, Christopher E. Heil, Maurice D. WeirPublisher:PEARSONCalculus: Early Transcendentals (3rd Edition)CalculusISBN:9780134763644Author:William L. Briggs, Lyle Cochran, Bernard Gillett, Eric SchulzPublisher:PEARSON
- Calculus: Early TranscendentalsCalculusISBN:9781319050740Author:Jon Rogawski, Colin Adams, Robert FranzosaPublisher:W. H. FreemanCalculus: Early Transcendental FunctionsCalculusISBN:9781337552516Author:Ron Larson, Bruce H. EdwardsPublisher:Cengage Learning





