Pre-Calculus Semester 1 Exam Review
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Questions and Answers

Calculate the sum of the fractions $\frac{3}{5} + \frac{4}{21}$. What is the result?

  • $\frac{42}{23}$
  • $\frac{42}{1}$
  • $\frac{42}{19}$
  • $\frac{14}{17}$ (correct)
  • In the formula $D = \sqrt{2rh + h^2}$ for the maximum distance visible from a height $h$, what value should be used for $h$ if the observation deck of the CN Tower is 1,135 ft high and needs to be converted to miles?

  • 1.135
  • 0.3427
  • 0.8277
  • 0.2155 (correct)
  • To find the maximum profit when producing microwaves according to the formula $P = \frac{1}{10}x(200 - x)$, what is the profit when producing 30 microwaves?

  • 1050
  • 1800 (correct)
  • 900
  • 750
  • What is the monthly salary of an executive if her total yearly earnings are $97,200, including an $8,400 Christmas bonus?

    <p>7</p> Signup and view all the answers

    How high does a 14-foot ladder reach if it is placed 2 feet away from the base of a building?

    <p>12</p> Signup and view all the answers

    If a jeweler has rings that are 20% silver, how much silver must be added to reduce the gold content of the alloy to 60%?

    <p>10</p> Signup and view all the answers

    For the division of the polynomials $\frac{9y^2 - 25}{3y^2 + 16y - 35}$ and $\frac{y^2 + 6y - 7}{3y^2 + 2y - 5}$, what is the simplified result?

    <p>2</p> Signup and view all the answers

    What is the maximum visible distance (D) someone can see from a height of 1,135 ft above the ground using the formula D = $\sqrt{2rh + h^2}$?

    <p>10.1</p> Signup and view all the answers

    What is the value of f(-4)?

    <p>-8</p> Signup and view all the answers

    What is the range of the function f(x) given?

    <p>(-9, 4]</p> Signup and view all the answers

    Which expression correctly represents the volume V of the box from the cardboard?

    <p>V(x) = x(24 - 2x)(35 - 2x)</p> Signup and view all the answers

    What is the domain for the volume V(x) of the box?

    <p>0 &lt; x &lt; 12</p> Signup and view all the answers

    If f(8) = 1 in a one-to-one function, what is f⁻¹(1)?

    <p>8</p> Signup and view all the answers

    What is the amount of salt in the barrel after 10 minutes?

    <p>25(1 - e^{-0.08 imes 10}) pounds</p> Signup and view all the answers

    How much will an investment of $1,000 grow to at the end of 4 years with an interest rate of 10% compounded monthly?

    <p>$1,732.05</p> Signup and view all the answers

    What is the exponential form of the equation log 4 16 = 2?

    <p>4^2 = 16</p> Signup and view all the answers

    What is the value of log 7 343?

    <p>3</p> Signup and view all the answers

    How would you express ln(x + 1) = 4 in exponential form?

    <p>e^4 = x + 1</p> Signup and view all the answers

    What is the logarithmic form of the equation 3^4 = 81?

    <p>log_3 81 = 4</p> Signup and view all the answers

    What is the result of log_5 5^625?

    <p>625</p> Signup and view all the answers

    Using the Laws of Logarithms, how can log_9 (x/8) be rewritten?

    <p>log_9 x - log_9 8</p> Signup and view all the answers

    What is the total amount of an investment of $3,000 at 6% interest compounded quarterly after 3 years?

    <p>$3,754.97</p> Signup and view all the answers

    If the interest rate is increased to 7%, what will the value of the investment be at the end of 3 years?

    <p>$3,747.20</p> Signup and view all the answers

    Calculating for 8% interest compounded quarterly, what is the amount at the end of 3 years?

    <p>$3,909.68</p> Signup and view all the answers

    Determine the formula for the amount of an investment, A(t), compounded quarterly over t years at an interest rate r.

    <p>A(t) = P(1 + r/4)^(4t)</p> Signup and view all the answers

    What is the domain of the function f(x) = log_8(x + 3)?

    <p>x &gt; -3</p> Signup and view all the answers

    Using the Laws of Logarithms, how would you simplify log_3(AB^5)?

    <p>log_3(A) + 5log_3(B)</p> Signup and view all the answers

    What conditions must be met for the expression log_a(2x / yz) to be valid?

    <p>x &gt; 0, y &gt; 0, z &gt; 0</p> Signup and view all the answers

    When simplifying the expression log_5(7) + log_2(5), what is the potential result?

    <p>log_10(35)</p> Signup and view all the answers

    What is the shape of the suspension cables in a suspension bridge?

    <p>Parabolic</p> Signup and view all the answers

    In the equation $9x^2 + 16y^2 = 144$, what are the lengths of the major and minor axes of the ellipse?

    <p>12 and 9</p> Signup and view all the answers

    For the hyperbola represented by the equation $\frac{y^2}{36} - \frac{x^2}{49} = 1$, what are the lengths of the transverse and conjugate axes?

    <p>6 and 7</p> Signup and view all the answers

    What allows you to identify that the graph of the equation $\frac{(x+1)^2}{16} - \frac{(y-1)^2}{9} = 1$ is a hyperbola?

    <p>One variable is squared positively and the other negatively.</p> Signup and view all the answers

    What is the correct form of the vertex for the parabola defined by the equation $(x - 4)^2 = 4(y + 1)$?

    <p>(4, -1)</p> Signup and view all the answers

    In the equation $9x^2 + 16y^2 - 36x + 160y + 292 = 0$, what type of conic section does it represent after completing the square?

    <p>Ellipse</p> Signup and view all the answers

    How do you find the foci of an ellipse from its standard form equation $\frac{(x - h)^2}{a^2} + \frac{(y - k)^2}{b^2} = 1$?

    <p>By calculating $c = \sqrt{a^2 - b^2}$.</p> Signup and view all the answers

    What characterizes the asymptotes of the hyperbola defined by the equation $\frac{(x + 1)^2}{16} - \frac{(y - 1)^2}{9} = 1$?

    <p>They intersect at the center of the hyperbola.</p> Signup and view all the answers

    What is the factored form of the expression $x^3 + 8y^3$?

    <p>(x + 2y)(x^2 - 2xy + 4y^2)</p> Signup and view all the answers

    Which expression is the result of factoring $216s^3 - 125t^6$?

    <p>(6s - 5t^2)(36s^2 + 30st^2 + 25t^4)</p> Signup and view all the answers

    What is the completely factored form of the expression $4x^2 - 81$?

    <p>(2x - 9)(2x + 9)</p> Signup and view all the answers

    What is the domain of the expression $\frac{7t^2 - 8}{2t + 6}$?

    <p>All real numbers except $t = -3$</p> Signup and view all the answers

    What is the simplified result of multiplying $(x^2 + 2xy + y^2)$ and $(x^2 - y^2)$?

    <p>$x^4 - y^4 + 2x^2y^2$</p> Signup and view all the answers

    For the quadratic equation $x^2 - 17x + 4 = 0$, what are the real solutions?

    <p>$x = \frac{17 \pm \sqrt{285}}{2}$</p> Signup and view all the answers

    What is the solution to the equation $|3x| = 7$?

    <p>$x = \frac{7}{3}, -\frac{7}{3}$</p> Signup and view all the answers

    Which of the following correctly represents the heights of the ball thrown straight upward with initial speed $72 ft/s$ over time according to the formula $h = -16t^2 + v_0t$?

    <p>The ball reaches the height of 0 ft at $t = 0$ and $t = 4.5$ seconds.</p> Signup and view all the answers

    Study Notes

    Pre-Calculus Semester 1 Exam Review

    • Multiple Choice Questions: The review includes multiple-choice questions, focusing on performing indicated operations. Examples are provided for adding fractions and performing other arithmetic operations.

    • Numeric Response Questions: Exercises involve problems related to the curvature of the Earth. Formula for maximum distance visible from a tall building, radius of the earth (r = 3960 mi), and distance of the CN Tower (1,135 ft) are given. The questions also cover simplifying rational expressions and algebra.

    • Multiple-Choice, Word Problems, and Other Operations: The question set contains multiple choice, word problems, and other calculations including various algebra questions. Example of a word problem is finding the number of ovens a company must manufacture for a profit of $750. Another one calculates a monthly salary from an annual salary amount.

    • Expressions and Equations: The review includes evaluating expressions involving imaginary numbers, complex numbers, and radicals. Also covered are simplifying expressions, including exponential and logarithmic expressions.

    • Graphs, Polynomials, Identities and Transformations: The review covers topics like determining if a function is a monomial, binomial, etc, and evaluating expressions involving logarithms. Other questions involve sketching graphs of functions and piecewise functions, identifying graphs and determining the domain.

    • Polynomial Functions: Problems involve factoring expressions, identifying types of polynomials, determining graphs of functions and asymptotes, real zeros, etc.

    • Exponential and Logarithmic Functions: The review covers exponential equations, logarithmic equations, finding solutions and converting to and from exponential form, using properties of logs, evaluating logs and exponential functions.

    • Equations and Inequalities: Problems include solving exponential equations and inequalities, performing operations on expressions, and transforming expressions. Also included are questions on sets, intervals, performing operations and expressing solutions in interval notation.

    • Radicals and Exponents: The study guide covers questions working with radicals, radicals with exponents, rational expressions and simplifying exponential expressions with variables.

    • Other Topics: Problems cover a broad range of other precalculus concepts, including numeric responses involving multiple concepts and finding the maximum distance from a height using formulas.

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    Prepare for your Pre-Calculus Semester 1 exam with this comprehensive review. It includes multiple-choice questions, numeric response problems, and word problems that cover key concepts such as operations with fractions, curvature of the Earth, and algebraic expressions. This is an essential tool for mastering the material and excelling in your course.

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