There are three parts to this project: Part A, Part B, and Part C. Complete all the sections within each part. Always show all of your work, and submit your work for all three parts for grading.
Part A
Let?s consider the US national debt and the US population as a function of time. We will be using this throughout Part A of the project.
1. Algebraic Equations
The current population of the United States is 317,000,000. The current national debt total is $17,000,000,000.
a. Based on these figures, use algebraic equations to calculate the approximate amount of debt per citizen. Show all of your work.
2. Linear Equations
Using the population and debt figures from section 1:
a. Find the linear equation for population in slopeintercept form.
? 2014. Any unauthorized reproduction or distribution of this material is prohibited without express written permission. Students are expected to maintain the integrity of the assignment by refraining from reproducing or posting the assignment or their completed work where it can be viewed by current or future students.
?Perform operations on algebraic expressions
?Perform operations on functions expressed in standard function notation
?Find solutions for algebraic equations and systems of linear equations
?Graph twovariable equations and inequalities
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?Assume the population growth is a linear function that grows at a steady, unchanging rate of
?0.9% per year, and that debt growth is a linear function that grows at a steady, unchanging
?rate of 13% per year.
?Final Project
College Algebra
b. Find the linear equation for debt in slopeintercept form
3. Graphing Linear Equations, Algebraic Equations
Begin with figuring out the algebraic equation for each, and then graph the linear equation. There will be two graphs, one for the population and one for the debt. Please show your work for how you figured out each graph.
Using the population and debt information from section 1:
a. Graph the linear equation for population growth and debt in two separate graphs. Label the values of the x and yaxes and title each graph. Show x from 0 (current year) to 30 (30 years from now).
b. Determine what the population and national debt will be 30 years from now. Calculate what the debt per citizen will be in 30 years. Show all your work.
4. Algebraic Equations, Graphing, and Linear Functions
Using calculations from sections 1 and 3:
a. Calculate the population, national debt, and debt per citizen in 10 and 20 years from now.
b. Complete the table below with your calculations:
Time (years) Debt ($) Population Debt/Citizen 0
10 20 30
c. Using the figures from the table above, graph the function that shows the amount of debt per citizen as a function of time.
i. Label the values of the x and yaxes and title the graph.
ii. Show x from 0 (current year) to 30 (30 years from now).
? 2014. Any unauthorized reproduction or distribution of this material is prohibited without express written permission. Students are expected to maintain the integrity of the assignment by refraining from reproducing or posting the assignment or their completed work where it can be viewed by current or future students.
???????17,000,000,000
?????317,000,000
???????????????????????????????
?Final Project
College Algebra
Iii. Identify the ordered pairs at x = 0, 10, 20 and 30 years either on the graph or below it. Is this a linear function? Why or why not?
5. Functions
Using the added information (below) regarding compound interest, calculate the national debt will be in 5, 10, and 20 years. Show equations for all three calculations. Please find the exact values, do not round.
The current national debt is $17,000,000,000. If the current compound interest rate on our national debt is 8% (compounded annually):
a. What will the national debt be in 5,10, and 20 years?
6. Algebraic Equations
Solve the following problem using an algebraic equation. Find the exact value and show all of your work.
The current national debt is $17,000,000,000. The interest rate is 8% and is compounded annually.
a. At what point does the compound interest on the national debt double the amount from the current year?
Part B
7. Equations with two variables
A company?s profit is 15% lower in June than in May, due to unforeseen changes in weather. The total profit for both months together is $32,375.
a. Use an algebraic equation with two variables (x, y).
b. Solve for the profits for each month separately: May and June.
c. Show all of your work and provide justifications or explanations for each step.
? 2014. Any unauthorized reproduction or distribution of this material is prohibited without express written permission. Students are expected to maintain the integrity of the assignment by refraining from reproducing or posting the assignment or their completed work where it can be viewed by current or future students.
?
?Part C
Final Project
College Algebra
?For this part, we will explore the various methods used to solve a quadratic equation. The given quadratic equation: ???? = ????! + 2???? â€“ 3
8. Graph the quadratic equation.
Be sure to label the x and yaxes and title the graph. Show all of your work for how the intercepts were found.
a. Graph the quadratic equation: ???? = ????! + 2???? â€“ 3
b. Label and include the ordered pair(s) for the xintercepts on the graph. c. Provide the solution to the quadratic equation: ????! + 2???? â€“ 3 = 0
9. Solve the quadratic equation by completing the square.
a.Solve:????! +2????3=0
b. Show all of the necessary work.
10. Solve the quadratic equation by utilizing the quadratic formula. a. Solve by using the quadratic formula: ????! + 2???? â€“ 3 = 0
b. Show all the necessary work.
11. Analysis of square root method.
a. Can the square root method be used to solve the quadratic equation?
b. Why or why not?
PROJECT SUBMISSION
????! + 2???? â€“ 3 = 0
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