
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
- What is the particular solution to the differential equation y′′ + y = 1/cos t ?arrow_forwardWhich of the following is the general solution to y′′ + 4y = e^2t + 12 sin(2t) ?A. y(t) = c1 cos(2t) + c2 sin(2t) + 1/8 e^2t − 3t cos(2t)B. y(t) = c1e^2t + c2e^−2t + 1/4 te^2t − 3t cos(2t)C. y(t) = c1 + c2e^−4t + 1/12 te^2t − 3t cos(2t)D. y(t) = c1 cos(2t) + c2 sin(2t) + 1/8 e^2t + 3 sin(2t)E. None of the above. Please include all steps! Thank you!arrow_forwardShow that i cote +1 = cosec 20 tan 20+1 = sec² O २ cos² + sin 20 = 1 using pythagon's theoremarrow_forward
- Find the general solution to the differential equationarrow_forwardcharity savings Budget for May travel food Peter earned $700 during May. The graph shows how the money was used. What fraction was clothes? O Search Submit clothes leisurearrow_forwardExercise 11.3 A slope field is given for the equation y' = 4y+4. (a) Sketch the particular solution that corresponds to y(0) = −2 (b) Find the constant solution (c) For what initial conditions y(0) is the solution increasing? (d) For what initial conditions y(0) is the solution decreasing? (e) Verify these results using only the differential equation y' = 4y+4.arrow_forward
- Aphids are discovered in a pear orchard. The Department of Agriculture has determined that the population of aphids t hours after the orchard has been sprayed is approximated by N(t)=1800−3tln(0.17t)+t where 0<t≤1000. Step 1 of 2: Find N(63). Round to the nearest whole number.arrow_forward3. [-/3 Points] DETAILS MY NOTES SCALCET8 7.4.032. ASK YOUR TEACHER PRACTICE ANOTHER Evaluate the integral. X + 4x + 13 Need Help? Read It SUBMIT ANSWER dxarrow_forwardEvaluate the limit, and show your answer to 4 decimals if necessary. Iz² - y²z lim (x,y,z)>(9,6,4) xyz 1 -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





