Mathematics For Elementary Teachers With Activities
5th Edition
ISBN: 9780134423401
Author: Sybilla Beckmann
Publisher: PEARSON
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Textbook Question
Chapter 8.4, Problem 4P
Given that
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An investigator analyzed the leading digits from 797 checks issued by seven suspect companies. The frequencies were found to be 0, 19, 2, 50, 361, 309, 10, 22, and 24, and those digits correspond to the
leading digits of 1, 2, 3, 4, 5, 6, 7, 8, and 9, respectively. If the observed frequencies are substantially different from the frequencies expected with Benford's law shown below, the check amounts appear to result
from fraud. Use a 0.10 significance level to test for goodness-of-fit with Benford's law. Does it appear that the checks are the result of fraud?
Leading Digit
Actual Frequency
Benford's Law: Distribution of Leading Digits
1
2
3
4
5
6
7
8
9
0
19
2
50
361
309
10
22
24
30.1%
17.6%
12.5%
9.7%
7.9%
6.7%
5.8%
5.1%
4.6%
Determine the null and alternative hypotheses.
Ho The leading digits are from a population that conforms to Benford's law.
H₁: At least one leading digit has a frequency that does not conform to Benford's law.
Calculate the test statistic, x².
x²
=
(Round to three…
3. Solve the Heat Equation with Initial and Boundary Conditions
Turn to page 71 for the heat equation problem. Solve the partial differential equation using
Fourier series or another suitable method, given the initial and boundary conditions.
Link: [https://drive.google.com/file/d/1RQ2OZK-LSxpRyejKEMg1t2q15dbpVLCS/view?
usp=sharing]
Provide all derivations and intermediate steps.
Name:
Tay Jones
Level Two
Date:
Algebra 3 Unit 3: Functions and Equations Practice Assessment
Class:
#7-OneNote
1. The function f(x) = x² is transformed in the following functions. List the vertex for each function,
circle whether the function opens up or down, and why. All three parts must be correct to receive Level 2
points. You can receive points for a, b, and c.
a) g(x) = -2(x+5)²
Vertex:
Opens Up Opens Down
Why? ais negative
-2
Vertex:
b) g(x) = (x + 2)² - 3
c) g(x) = -4(x + 2)² + 2
Opens Up
Opens Down
Vertex:
Opens Up
Opens Down
Why?
4
Ca is negative)
Why? his positive
2. The graph of the function f(x) is shown below. Find the domain, range, and end behavior. Then list the
values of x for which the function values are increasing and decreasing.
f(x)
Domain:
End Behavior:
As x → ∞o, f(x) -> -6
As x, f(x) ->
Range:
Where is it Increasing? (002]
Where is it Decreasing? (1,00)
Chapter 8 Solutions
Mathematics For Elementary Teachers With Activities
Ch. 8.1 - Johnny says that 3 is a multiple of 6 because you...Ch. 8.1 - Manuela is looking for all the factors of 90. So...Ch. 8.1 - Show how to find all the factors of the following...Ch. 8.1 - a. Write a word problem such that solving your...Ch. 8.1 - a. Write a problem about a realistic situation...Ch. 8.1 - Solve problems (a) and (b), and determine whether...Ch. 8.1 - a. If A and how are answer, B are counting numbers...Ch. 8.1 - * If A, B, and C are counting numbers and both A...Ch. 8.2 - Describe a way that the children in Mrs. Verner’s...Ch. 8.2 - Explain why an odd counting number can always be...
Ch. 8.2 - For each of the two designs in Figure 8.5, explain...Ch. 8.2 - Without determining the number of dots in the...Ch. 8.2 - If you add an even number and an even number, what...Ch. 8.2 - If you multiply an odd number and an odd number,...Ch. 8.2 - * If you multiply an even number by 3 and then add...Ch. 8.2 - * If you multiply an odd number by 3 and then add...Ch. 8.2 - * Suppose that the difference between two counting...Ch. 8.2 - * Suppose that the difference between two counting...Ch. 8.2 - * If you add a number that has a remainder of 1...Ch. 8.2 - * If you multiply a number that has a remainder of...Ch. 8.3 - Use the divisibility test for 3 to determine...Ch. 8.3 - According to the divisibility test for 10, to...Ch. 8.3 - According to the divisibility test for 5, to...Ch. 8.3 - Beth knows the divisibility test for 3. Beth says...Ch. 8.3 - What are all the different ways to choose the ones...Ch. 8.3 - Sam used his calculator to calculate...Ch. 8.3 - Explain how to modify the divisibility test for 3...Ch. 8.3 - For each of the numbers in (a) through (d), verify...Ch. 8.3 - a. Give a clear and complete explanation for why...Ch. 8.3 - a. Find a divisibility test for 25; in other...Ch. 8.3 - a. What are all the different ways to choose the...Ch. 8.3 - a. Find a divisibility test for 8. In other words,...Ch. 8.3 - a. Is it true that a whole number is divisible by...Ch. 8.3 - * Investigate the questions in the following parts...Ch. 8.3 - a. If you add 2 consecutive counting numbers (such...Ch. 8.4 - For which counting numbers, N, greater than 1, is...Ch. 8.4 - Use trial division to determine whether 251 is...Ch. 8.4 - For each of the numbers in (a) through (d),...Ch. 8.4 - Given that 792=23.32.11, find all the factors of...Ch. 8.4 - Without calculating the number 1923+1, explain why...Ch. 8.4 - Following Euclid’s proof that there are infinitely...Ch. 8.5 - Why do we not talk about a greatest common...Ch. 8.5 - Show how to use the definition of GCF to determine...Ch. 8.5 - Show how to use the definition of GCF to determine...Ch. 8.5 - Show how to use the definition of LCM to determine...Ch. 8.5 - Show how to use the definition of LCM to determine...Ch. 8.5 - Show how to use the slide method to determine the...Ch. 8.5 - Show how to use the slide method to determine the...Ch. 8.5 - Show how to use the slide method to determine the...Ch. 8.5 - Find the GCF and LCM of 25.32.5 and 23.34.7...Ch. 8.5 - Find the GCF and LCM of 34.52.75.11 and 37.53.73...Ch. 8.5 - Describe in general how to find the GCF and LCM of...Ch. 8.5 - Show all the details in the following...Ch. 8.5 - Show all the details in the following...Ch. 8.5 - Write a word problem that requires calculating the...Ch. 8.5 - Write a word problem that requires calculating the...Ch. 8.5 - Suppose you are teaching students about least...Ch. 8.5 - Kwan and Clevere are playing drums together,...Ch. 8.5 - At the zoo, the birds must be fed 12 cups of...Ch. 8.5 - There are periodical cicadas with 13-year life...Ch. 8.5 - In a clothing factory, a worker can sew 18 Garment...Ch. 8.5 - Keiko has a rectangular piece of fabric that is 48...Ch. 8.5 - A large gear will be used to turn a smaller gear....Ch. 8.5 - A large gear is used to turn a smaller gear. The...Ch. 8.6 - Use the standard division algorithm to determine...Ch. 8.6 - Use the standard division algorithm to determine...Ch. 8.6 - Use the standard division algorithm to determine...Ch. 8.6 - Write the following decimals as fractions. Explain...Ch. 8.6 - What is the 100th digit to the right of the...Ch. 8.6 - What is another way to write 1.824 as a decimal?...Ch. 8.6 - Without actually determining the decimal...Ch. 8.6 - Give an example of an irrational number, and...Ch. 8.6 - In your own words, prove that the square root of 5...Ch. 8.6 - Carl’s calculator displays only 10 digits. Carl...Ch. 8.6 - Fran has a calculator that shows at most 10...Ch. 8.6 - Tyrone used a calculator to solve a problem. The...Ch. 8.6 - * Show how to find the exact decimal...Ch. 8.6 - Prob. 14PCh. 8.6 - Prob. 15PCh. 8.6 - Prob. 16PCh. 8.6 - Prob. 17PCh. 8.6 - a. Use a calculator to calculate the decimal...Ch. 8.6 - a. Use a calculator to calculate the decimal...Ch. 8.6 - a. Suppose that a fraction AB where A and B are...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, subject and related others by exploring similar questions and additional content below.Similar questions
- For the distribution drawn here, identify the mean, median, and mode. Question content area bottom Part 1 A. Aequalsmode, Bequalsmedian, Cequalsmean B. Aequalsmode, Bequalsmean, Cequalsmedian C. Aequalsmedian, Bequalsmode, Cequalsmean D. Aequalsmean, Bequalsmode, Cequalsmedianarrow_forwardQ3: Define the linear functional J: H₁(2) R by ¡(v) = a(v, v) - L(v) Л Let u be the unique weak solution to a(u,v) = L(v) in H(2) and suppose that a(...) is a symmetric bilinear form on H(2) prove that 1- u is minimizer. 2- u is unique. 3- The minimizer J(u) can be rewritten under 1(u) = u Au-ub, algebraic form 1 2 Where A, b are repictively the stiffence matrix and the load vector Q4: A) Answer 1- show that the solution to -Au = f in A, u = 0 on a satisfies the stability Vullfll and show that ||V(u u)||||||2 - ||vu||2 2- Prove that Where lu-ul Chuz - !ull = a(u, u) = Vu. Vu dx + fu. uds B) Consider the bilinea forta Л a(u, v) = (Au, Av) (Vu, Vv + (Vu, v) + (u,v) Show that a(u, v) continues and V- elliptic on H(2)arrow_forward2. Classify the Stability of Fixed Points in a Dynamical System The dynamical system problem is located on page 60 of the file. Identify the fixed points and classify their stability using linearization and eigenvalues. Link: [https://drive.google.com/file/d/1RQ2OZk-LSxpRyejKEMg1t2q15dbpVLCS/view? usp=sharing] Provide a detailed explanation of your analysis.arrow_forward
- Evaluate the Z-Transform of the Sequence The Z-transform problem is provided on page 70. Compute the Z-transform of the given sequence and determine the region of convergence. Link: [https://drive.google.com/file/d/1RQ2OZK-LSxpRyejKEMg1t2q15dbpVLCS/view? usp=sharing] Show all steps and provide detailed reasoning.arrow_forward7. Apply Green's Theorem to Evaluate the Line Integral Check page 55 for the Green's theorem problem. Use Green's theorem to convert a line integral into a double integral and compute the result. Link: [https://drive.google.com/file/d/1RQ2OZK-LSxp RyejKEMg1t2q15dbpVLCS/view? usp=sharing] Provide a detailed explanation and calculation.arrow_forward8. Perform Singular Value Decomposition (SVD) on a Matrix The SVD problem can be found on page 66. Decompose the given matrix into its singular values, left singular vectors, and right singular vectors. Link: [https://drive.google.com/file/d/1RQ2OZK-LSxpRyejKEMg1t2ql5dbpVLCS/view? usp=sharing] Show the complete process and verify the decomposition.arrow_forward
- 6. Diagonalize the Matrix and Verify the Result Check page 64 of the document for the matrix diagonalization problem. Find the eigenvalues and eigenvectors to diagonalize the matrix, then verify the result. Link: [https://drive.google.com/file/d/1RQ2OZK-LSxpRyejKEMg1t2q15dbpVLCS/view? usp=sharing] Present all calculations systematically.arrow_forward9. Analyze the Fourier Transform of a Discontinuous Function Refer to page 67 for the Fourier transform problem. Compute the Fourier transform of the given piecewise function and discuss its properties. Link: [https://drive.google.com/file/d/1RQ2OZK-LSxpRyejKEMg1t2q15dbpVLCS/view? usp=sharing] Present all steps in detail.arrow_forward4. Determine the Taylor Series Expansion About a Point Refer to page 62 for the Taylor series problem. Find the Taylor series expansion of the function about the specified point and include the radius of convergence. Link: [https://drive.google.com/file/d/1RQ2OZK-LSxpRyejKEMg1t2q15dbpVLCS/view? usp=sharing] Explain the methodology and verify the series.arrow_forward
- 10. Prove the Orthogonality of Eigenfunctions Go to page 68 of the document for the eigenfunction problem. Prove the orthogonality of the eigenfunctions of a given Sturm-Liouville problem. Link: [https://drive.google.com/file/d/1RQ2OZK-LSxpRyejKEMg1t2q15dbpVLCS/view? usp=sharing] Provide a rigorous proof, including necessary integrals and conditions.arrow_forwardShow what to do on the graph visually please!arrow_forward1. Perform a Change of Variables for the Given Integral Refer to page 59 in the shared document for the integral problem. Apply a specified change of variables to simplify the integral and evaluate it. Link: [https://drive.google.com/file/d/1RQ2OZk-LSxpRyejKEMg1t2q15dbpVLCS/view? usp=sharing] Clearly outline each step in the transformation and solution.arrow_forward
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