Concept explainers
a.
To create a
a.
Answer to Problem 23CT
The scatter plot of the data is:
Explanation of Solution
Given information:
The data given is:
Calculation :
The scatter plot of the data is given below:
b.
To find the quadratic model of the data.
b.
Answer to Problem 23CT
The quadratic model of the data is
Explanation of Solution
Given information:
The data given is:
Calculation :
The values of the quadratic model is:
Hence, the quadratic model of the data is
c.
To graph the quadratic model and determine if it is a good fit for the data.
c.
Explanation of Solution
Given information:
The quadratic model of the data is
The scatter plot of the data is:
Graph:
The graph of the quadratic model is
Interpretation:
Yes, the quadratic model is good fit for the data.
The budget rose to a certain point and then started falling.
d.
To estimate the amounts spent on national defense in 2015 and 2020.
d.
Answer to Problem 23CT
The amount spent in National defense in 2015 is estimated to be
The amount spent in National defense in 2015 is estimated to be
Explanation of Solution
Given information:
The quadratic model of the data is
The scatter plot of the data is:
Calculation :
To estimate the amounts spent on national defense in 2015 and 2020, put
Estimate of the amount spent in 2015 can be calculated by:
Hence, the amount spent in National defense in 2015 is estimated to be
Estimate of the amount spent in 2020 can be calculated by:
Hence, the amount spent in National defense in 2015 is estimated to be
e.
To explain if the model is useful for predicting the amounts spent on national defense for years beyond 2013.
e.
Answer to Problem 23CT
No, it will not be useful for predicting the data after the year 2013.
Explanation of Solution
Given information:
The amount spent in National defense in 2015 is estimated to be
The amount spent in National defense in 2015 is estimated to be
On calculating the estimates of the data for the year 2015 and 2020, it is seen that the estimated amounts are decreasing because of the graph.
No, it will not be useful for predicting the data after the year 2013.
Chapter 2 Solutions
Precalculus with Limits: A Graphing Approach
- I) For what value(s) of x does g(x) = -4? Separate multiple answers with commas as needed. J) Give the interval(s) of such that g(x) > 0. Use the union symbol between multiple intervals. K) Give the interval(s) of such that g(x) <0. Use the union symbol between multiple intervals.arrow_forwardneed help on Barrow_forward4. Use the properties of limits to help decide whether each limit exists. If a limit exists, fi lim (2x²-4x+5) a) x-4 b) lim 2 x²-16 x-4x+2x-8arrow_forward
- 7. The concentration of a drug in a patient's bloodstream h hours after it was injected is given by 0.17 h Ah= h²+2' Find and interpret lim A(h). Remember, the answers to word problems should always be given in a complete h→00 sentence, with proper units, in the context of the problem.arrow_forward#2arrow_forward2. We want to find the inverse of f(x) = (x+3)² a. On the graph at right, sketch f(x). (Hint: use what you know about transformations!) (2 points) b. What domain should we choose to get only the part of f (x) that is one- to-one and non-decreasing? Give your answer in inequality notation. (2 points) - c. Now use algebra to find f¯¹ (x). (2 points) -4- 3- 2 1 -4 -3 -2 -1 0 1 -1- -2- --3- -4 -N- 2 3 4arrow_forward
- 1. Suppose f(x) = 2 4 == x+3 and g(x) = ½-½. Find and fully simplify ƒ(g(x)). Be sure to show all x your work, write neatly so your work is easy to follow, and connect your expressions with equals signs. (4 points)arrow_forwardFind the ane sided limit lim 2 x+1-3x-3arrow_forward4 44 3+ 2+ -4-3 -2 -1 2 3 4 -2 -3. Find the values at X which the graph is discontinuous and categorize them.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