Concept explainers
a.
To Sketch: The
Given:
The average U.S. exports of the product for the years
Year | Exports |
Graph:
Let
Use the instruction to generate a scatter diagram for a set of data:
Press the data column and
And Press the
To clear the graph and enter a new data set, press
The scatter plot for the given data with years in
b.
To Model: Superimpose the parabolic curve on the scatter plot using quadratic regression with a quadratic function. Analyse whether it is good fit or not.
The quadratic function is
Given:
The average U.S. exports of the product for the years
Year | Exports |
Calculation:
Compute the Quadratic regression equation for the provided data using Ti-83 calculator as follow:
Press
Press
The screenshot is as follows:
Thus, the quadratic function is
Superimpose the parabolic curve on the scatter plot:
Enter the model
Thus, the fit is very good since the graph usually passes through the points.
c.
To Determine: The number thousands of barrels of oil the country will export per day in
Approximately
Given:
The average U.S. exports of the product for the years
Year | Exports |
Calculation:
Let, the number of years be
To find the number of gallons of oil will be produced per day in
So, subtract the initial year
Now, substitute
Round to the approximate values:
Thus, approximately
Chapter 1 Solutions
PRECALCULUS:GRAPHICAL,...-NASTA ED.
- 21. First-Order Constant-Coefficient Equations. a. Substituting y = ert, find the auxiliary equation for the first-order linear equation ay+by = 0, where a and b are constants with a 0. b. Use the result of part (a) to find the general solution.arrow_forwardLet f be a function whose graph consists of 5 line segments and a semicircle as shown in the figure below. Let g(x) = √ƒƒ(t) dt . 0 3 2 -2 2 4 5 6 7 8 9 10 11 12 13 14 15 1. g(0) = 2. g(2) = 3. g(4) = 4. g(6) = 5. g'(3) = 6. g'(13)=arrow_forwardThe expression 3 | (3+1/+1) of the following integrals? A Ов E + + + + 18 3+1+1 3++1 3++1 (A) √2×14 dx x+1 (C) 1½-½√ √ ² ( 14 ) d x (B) √31dx (D) So 3+x -dx is a Riemann sum approximation of which 5 (E) 1½√√3dx 2x+1arrow_forward
- 2. Suppose the population of Wakanda t years after 2000 is given by the equation f(t) = 45000(1.006). If this trend continues, in what year will the population reach 50,000 people? Show all your work, round your answer to two decimal places, and include units. (4 points)arrow_forward3. Solve the equation, give the answer exactly (no calculator approximations), and show all your work. (4 points) log5 2x = 3arrow_forwardLet I = f(x) dx, where f is the function whose graph is shown. 4 2 y f X 1 2 3 4 (a) Use the graph to find L2, R2 and M2. R₂ M2 = = = (b) Are these underestimates or overestimates of I? O 42 is an underestimate. O 42 is an overestimate. ◇ R2 is an underestimate. OR2 is an overestimate. OM2 is an underestimate. ○ M2 is an overestimate. (c) Use the graph to find T2. T₂ =arrow_forward
- Vector u has a magnitude of 23 and vector v has a magnitude of 83. The angle between the two vectors is 126 degrees.a) Draw a fully-labelled vector diagram showing the two vectors and the resultant vector when they are added together.b) Find the magnitude of the resultant vector.c) Find the direction of the resultant vector relative to vector u. Solding by finding the x and y of the vectors and addingarrow_forwardFind the range and all the answers. Remark that the range isn’t between -(pi/2) and (pi/2)arrow_forwardPlease draw a detailed grapharrow_forward
- For allarrow_forward3) If a is a positive number, what is the value of the following double integral? 2a Love Lv 2ay-y² .x2 + y2 dadyarrow_forward16. Solve each of the following equations for x. (a) 42x+1 = 64 (b) 27-3815 (c) 92. 27² = 3-1 (d) log x + log(x - 21) = 2 (e) 3 = 14 (f) 2x+1 = 51-2xarrow_forward
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