Mt/CS 410 Mathematical Modeling - Fall 2002

Department of Mathematics & Computer Science
CARDINAL STRITCH UNIVERSITY
Sr. Barbara E. Reynolds, Ph.D.

Study Guide for Benchmark Test #1: Prerequisite Skills

This benchmark test will contribute 5% to your final course grade. The test will be available September 3. The window-of-opportunity for Benchmark #1 is September 3 and September 13. You may arrange with the instructor to take this test outside of class any time during this window-of-opportunity.

This test will have ten problems on material which is prerequisite for this course. The sample benchmark questions give an idea of the difficulty level and type of question to expect on this test. To pass this benchmark, a student must get at least nine problems correct, with no partial credits.

Although the passing score for the Benchmarks is very high, you do have an opportunity to retake this test if you don't pass it on the first attempt. Since there is a requirement that you study between two attempts of this test, you cannot take and retake the test twice on the same day. If you want to take advantage of being able to retake this benchmark, you should attempt it early in this window-of-opportunity. You may NOT use a calculator or computer as you work on the benchmark test.

Basic Algebra

  • You should be able to:
    • use the rules of exponents to simplify an algebraic expression;
    • calculate the sum or product of polynomials;
    • factor a quadratic or cubic polynomial;
    • evaluate a given function, f(x), at particular values (such as at x = 5, x = x+h, and x = g(x));
    • find the slope of a straight line from its graph, its algebraic formula, or a set of points which lie on the line;
    • find the length and the midpoint of a line segment, given its endpoints;
    • graph a line or a polynomial given its equation;
    • determine whether two given lines are parallel or perpendicular;
    • find the product of a given pair of polynomial expressions;
    • simplify algebraic expressions;
    • solve a linear equation;
    • solve quadratic or cubic equations (by factoring and/or using the quadratic formula);
    • locate (plot) points in 2-dimensional space using rectangular coordinates;
    • find the equation of a line given its slope and a point on the line;
    • find the equation of a line given two points which lie on it;
    • give the equation of the line which is tangent to a given curve at a specified point.

  • You should know and be able to use:
    • formulas for length of a line segment;
    • formulas for area of a square, rectangle, triangle, or circle;
    • formulas for volume of a rectangular box, or ordinary cylinder;
    • formulas for perimeter and circumference of simple geometric figures.

  • Trigonometry

  • You should be familiar with basic right-triangle trigonometry:
    • the six trigonometric relationships,
    • the relationship between degrees and radians,
    • the two "standard" triangles and the "unit circle,"
    • the values of the trigonometric relationships of the angles in the two standard triangles,
    • the trigonometric relationships which can be verified in the unit circle,
    • the Pythagorean theorem, and the trigonometric versions of the Pythagorean theorem.

  • Difference Quotient

  • You should be able to set up and simplify a difference quotient for a given function.

  • Derivatives

  • You should be able to:
    • calculate derivatives for polynomials, and for the six trigonometric functions;
    • use the product rule, the quotient rule, and the chain rule to calculate derivatives for simple combinations of functions.

  • Antiderivatives and Definite Integrals

  • You should be able to:
    • use the power rule to integrate an expression of the form x^n, both for n /= 1 and for n = 1;
    • calculate antiderivatives and definite integrals for polynomials, and for the derivatives of the six trigonometric functions;
    • use simple substitutions to calculate an antiderivative;
    • evaluate the definite integral of an expression of the form e^u du;
    • find any local maxima or minima on the graph of a given curve;
    • find the area bounded by a given curve and the x-axis.


  • Sample Benchmark Questions

    1. Write the expression (sqrt(x^3)) in the form x^p.
    2. Write the expression 1/ (x^3) in the form x^p.
    3. Write the expression (x^4) / (x^7) in the form x^p.
    4. Factor the polynomial f(x) = x^3 - x^2 - 6x.
    5. Find the zeros of f(x) = x^3 - x^2 - 6x.
    6. Does the polynomial h(x) = x^2 + x + 1 have any real zeros? Explain.
    7. Does the polynomial g(x) = x^2 + x + 0.1 have any real zeros? Explain.
    8. Simplify: (t^2) (3t^2 + 3) + (t^2 - 5t).
    9. Find the product: (t^2) (3t + 3) (t^2 - 5t).
    10. Find the equation of the tangent to f(x) = x^3 - x^2 - 6x at the point where x = 3.
    11. If g(x) = 3t^2, find an expression for g(-7).
    12. If g(x) = 3t^2, find an expression for g(x+5).
    13. Find an angle whose tangent is -1.
    14. If the sin (t) is a/c, find expressions for each of the other five trigonometric functions in terms of a and c.
    15. Find the equation of a line which passes through the point (3,5) and goes through the origin.
    16. Find the length of the line segment from (3,5) to (-3,8).
    17. Find the length of the line segment from (3,5) to (3,8).
    18. Does the origin lie on the line which contains the points (3,5) and (-2,-7)? How do you know?
    19. Does the origin lie on the line which contains the points (3,5) and (-3,-5)? How do you know?
    20. Find the midpoint of the line segment from (3,5) to (-3,8).
    21. How many feet of fencing are needed to enclose a field which is 76 yards wide and 50 yards long? What if the field is adjacent to a river and only needs to be fenced along three sides?
    22. If the circumference of a circle is 10 feet, what is its area? (You may leave your result in terms of pi.)
    23. If an equilateral triangle has sides of length 3 units, what are the lengths of its altitude and its base?
    24. A rectanglar box has a volume of 600 cubic inches, and its height is 1.5 feet. If the length of the box is is three times its width, what is the surface area of the box?
    25. Set up and simplify a difference quotient for p(x) = 4 x^3 + 5.
    26. Set up and simplify a difference quotient for q(x) = 5 / (x^2).
    27. Set up a difference quotient for g(x) = 3/x. Show that this can be simplified to -3/[x (x+h)].
    28. Find f'(t) if f(t) = 3 * t^2 + sqrt (t) - 5/t.
    29. Find the derivative of x^2 * cos(x).
    30. Find the slope of the tangent line to the graph of f(x) = x^2 * cos(x) at the point where x = pi/3.
    31. Find the equation of the tangent line to the graph of f(x) = x^2 * cos(x) at the point where x = pi/3.
    32. Find an antiderivative of f(t) = 3 * t^2 + sqrt (t) - 5/t.
    33. Find an antiderivative of f(t) = t * sin(3 * t^2).
    34. What is the derivative of cot (y)?
    35. Use the quotient rule to prove that the derivative of tan (x) is (sec (x))^2.
    36. If g(x) = (3 * x^2) * ( sin(x) ), find dg/dx.
    37. Find any local maxima or minima on the graph of the curve given by f(y) = 3y^3 - 2y^2 + 6y - 4.
    38. Find the area bounded by f(t) = 3t^2 - 5 and the x-axis.
    39. Find the area bounded by one arc of the cosine function and the x-axis.



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    This page was updated on August 20, 2002.