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Mathematics Questions and Answers April 11, 2021

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Your initial post should be at least 150 words in length. Follow these instructions: Post a minimum of two follow-up responses to your peers by the end of Day 7. In your reply, you can help your classmate correct their solution or create a similar problem and solve it. Hello Class, My assigned number is 6 State an application of a system of two

Karen Economics class calculates grades using a weighed score. If 15% of her grade comes from homework, 20% from exam 1, 20% from exam 2, 20% from exam 3, and 25% from the final. Calculate her score if she earned the following scores. Round to the nearest tenth of a percent. Show your work to justify your answer (there is more than one correct

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Factor the following equation 28u 2 w 3 + 14u 9 w 2 x 4

Translate and solve. Then write the solution in interval notation. Twenty times y is at most 100.

Could use some help under 30 minutes thanks Classify the origin as an attractor, repeller, or saddle point of the dynamical system Xk. 1 = Ax, . Find the directions of greatest attraction and/or repulsion. - 0.1 1.2 A= - 1.5 2.6 Classify the origin as an attractor, repeller, or saddle point. Choose the correct answer below. O A. The origin is a
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A physiological psychologist is investigating the effect of a new drug B-terpinol on motor skills. she suspects that the drug will affect the basal ganglia and block motion feedback control during fine positioning tasks. she also thinks sex will affect the outcome measure as well. she divides 40 expreimental participants (20 males and 20 females)

1. Using the following table of relation between X & Y (Y is the independent Variable): Xi 0 2 4 3 6 7 8 9 Vi 5 8 2 3 20 30 a. Find the estimated regression equation. Show ALL your calculations and the appropriate formula. WRITE Formula in all the questions below and substitute for the numbers, demonstrate your work. b. Calculate R2. Comment on
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mal Distributions: Question 12, 5.2.15-T > HW Score: 31.77%, 5.08 of 16 points (X Points: 0 of 1 Save Assume a member is selected at random from the population represented by the graph. Find the probability that the member Pregnancy Length in a Population of New Mothers selected at random is from the shaded region of the graph. Assume the variable
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Instructions on screen 5 1 point What is the perimeter of A XY Z? Y B Z A UT 2 X 3 type your answer... 4
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Do you know how to solve this problem? Details below Thank you so much for all your help! 8. Elasticity. The price along the West Coast of the United States for Japanese spruce logs (in dollars per cubic meter) based on the demand (in thousands of cubic meters per day) has been approximated by p = 0.604q2 - 20.16q + 263.067. (a) Find the
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Please see attachment! 45. At Meadowlark Elementary School. the 3rd grade students take quizzes after everyr book theyr read to check their comprehension of what they read. The following table shows the passing rates on these quizzes for three students in each of the three academic trimesters of the school year. ----m -.,....... sasaas Does this
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Determine how many statements (premises and conclusions) are in the following argument. In other words, if you were to diagram the argument, how many numbers would appear in the diagram? I have three reasons for thinking that drinking soda on a regular basis is bad. First, soda contains a lot of sugar. Second, many of those soda cans and bottles

find premiter and area of triangle 3 FF 18f+ 7 FX The perimeter of the triangle is = FL The area
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I am stuck on this problem please help: (8 points) A electronics manufacturer has developed a new type of remote control button that is designed to operate longer before failing to work consistently. A random sample of 15 of the new buttons is selected and each is tested in continuous operation until it fails to work consistently. The resulting
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Task 3: Consider the possibility of conditions allowing the E. Coli to double every 30 1300 minutes (which would mean quadrupling 1250 every hour.) 1200 a. Write an exponential function that 1150 represents the number of bacteria E. Coli if we start with 4 bacteria and the number 1100 quadruples every hour. 1050 F(x) = 1000 950 b. Graph it using a
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Explain the type of causal relationship demonstrated in each of the following graphs, with a full explanation of your reasoning Heights of Flowers vs. Amount Spent on Jackets Heights of flowers (cm) un o u o ti 2000 4000 6000 8000 10000 12000 Amount Spent on Jackets ($)b) Severity of Illness vs. Level of Depression Severity of Illness Level of
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Astudent's course grade is based on one midterm that counts as 15% of his finalgrade, one class project that counts as 15% of his finalgrade, a set of homework assignments that counts as 30% of his finalgrade, and a final exam that counts as 40% of his final grade. His midterm score is 70, his project score is 85, his homework score is 88, and his

Find the indicated limit, if it exists. \f\f\f\f
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Please help For each of the following fitted trends, make a prediction for period t = 17: (a) ye = 2,2860.076t (Do not round the intermediate calculations. Round your final answer to 1 decimal place.) y = (b) y- = 1,149 + 12.78t (Do not round the intermediate calculations. Round your final answer to 1 decimal place.) y (c) ye = 501+ 18.2t - 71t (A
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can i get a bit of help with this? Point J is on line segment / K. Given IK = 5x, IJ = 4, and JK = 4x, determine the numerical length of IK. Answer: IK Submit Answer attempt i out of 2
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please help with this question (1 point) Consider the function f ( x) = - X = 1 - 4x Give the Taylor series for f(x) for values of x near 0. f(x ) = M n=0 Give the open interval of convergence for this Taylor series. (Note: Give your answer in interval notation.) Give the series expansion of f(x) for very large values of x (i.e., in powers of
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Evaluate a(b(n)) for a(b) = 3b and b(n) = 2n - 5 when n = 5. And Evaluate (f + g)(x) if f(x) = 3x 2 and g(x) = 2x - 4 when x = 3. Thanks for the help!

Hi, please help me solve for Question B. Thank you! Score: 0.6 of 1 pt h 38 of 43 (33 complete) HW Score: 73.26% X 6.4.18 *= Quest A genetics experiment involves a population of fruit flies consisting of 1 male named Christopher and 3 females named Diana, Elena, and Fergie. Assume that two fruit flies are randomly selected with replacement. a.
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Fertilizer: A new type of fertilizer is being tested on a plot of land in an orange grove, to see whether it increases the amount of fruit produced. The mean number of pounds of fruit on this plot of land with the old fertilizer was 383 pounds. Agriculture scientists believe that the new fertilizer may change the yield. State the appropriate null
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multiple choice question: Which Level of Measurement(s) is/are appropriate for the Independent Samples t-test? A) Both variables can be I/R or Ordinal with 4+ cat. or Dummy for both variables B) IV = Nominal or Ordinal with 2 categories; DV = I/R, Ordinal w/4+ cat., dummy as exception C) IV = Nominal or Ordinal with 3 categories; DV = I/R, Ordinal

in a recent study on gender differences in education, a sample of 1' boys had a mean score of 15.1 and a standard deviation of 4.1 on a Standardized Math Test. A sample of 11 girls had a mean score of 2:12 and a standard deviation of 3.5 on the same test. What is the t-statistic for this data? [Use the sample of boys as Group 1.}
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An investor is given the following information about the returns on two stocks: -_ m Standard deviation (a) If he is most interested in maximizing his returns: which stock should he choose?r {b} If he is most interested in minimizing his risk, which stock should he cheese?r {c} I{loingmte the expected value and standard deviation of the portfolio
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Use the limit definition of the derivative to find the slope of the tangent line to the curve f(x)=3x2+5x+6 at x=4

Find all solutions to the equation below in the interval [0,360)[0,360). 5cos(t)+4cos2(t)=1

Triples and Home Runs The data below show the number of three-base hits (triples) and the number of home runs hit during the season by a random sample of MLB teams. Triples 33 37 27 29 18 21 Home runs 305 345 245 265 155 185 Send data to Excel The correlation coefficient for the data is r= 1 and a=0.01. Should regression analysis be done? The
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To evaluate whether or not the intake of a vitamin or mineral is adequate, comparisons are made between the intake distribution and the requirement distribution. Here is some information about the distribution of vitamin C intake, in milligrams per day, for men aged 19 to 30 years: \f
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Fresh pumpkin costs $0.29/lb. It has a yield percent of 47%. What is the EP cost per pound?

A radar gun for measuring the speed of moving vehicles being tested. The device is repeatedly exposed to vehicles that are traveling 60 miles per hour, resulting in the data shown on this histogram. Is there bias in these measurements

A law can be written or unwritten. Question 14 options: True False

Convert the recipe below to serve 100 guests. Generate a shopping list of quantities needed for the 100portion recipe. Write the shopping list using the unit given in the shopping list column; round up to the nearest whole unit to ensure a sufficient order Recipe: Carrot and Green Bean Saut Yield = 12 portions Ingredient Quantity Conversion Factor

Suppose that X and Y are jointly continuous random variables with pdf ? Problem B.2. Suppose that X and Y are jointly continuous random variables with pdf f(x,y)=k(my)2, 0
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A full-service brokerage firm gathered information on how its clients were investing for retirement. Based on age, clients were categorized according to where the largest percentage of their retirement portfolio was invested. This data is shown in the table below. Question 1: The percentage of clients over age 50 is: a) 33.3% (34/102) b) 18.1%
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Explain the following charts as it relates to Smartphoneownership by Age.Explain the type of graphs used as well. a. Smartphone Ownership By Age 1.2 Smartphone In Other Cell =No Cell Phone Ownership (%) 0.8 0.6 0.4 0.2 0 18-24 25-34 35-44 45-54 55-64 65+ Age Categoryb. Smartphone Ownership By Age 0.7 Smartphone III Other Cell = No Cell Phone 0.6
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4) Let () = { [0,2] 7 (2,3] 2 + 1 (3,4] a) Find 2 0 , 3 0 b) Obtain formulas for () = \f
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Calculate the critical degrees of freedom and identify the critical t value for a single-sample t test in each of the following situations, using p=.05 for all scenarios. Two-tailed test, N = 10, t = 2.35 df= (9) critical t = (answer)

Mini- Study Part I conduct a mini study. You will survey 50 people through any method you choose to find out information on your topic. You will then calculate the statistics for your data. It is important to remember your mini study should use quantitative values since this is a statistics course so you can complete the required calculations.

The running time in 1500-metre run for US Olympics athletes is best modeled according to the Normal distribution with a mean of 4.1 minutes (that is, 4 minutes and 6 seconds) and a standard deviation of 0.45 minutes (or equivalently, 27 seconds). What is the cut-off time (in minutes and seconds) for the 6% slowest runners? The running time in

Please help me to solve this question as below. Regression and Classification. The standard linear regression model is: y = Xw te, where X is an n x d matrix of predictor vari- ables, y is an n-dimensional vector of response variables, and e ~ N(0, o'I) is an n-dimensional vector of model errors. (a) What is the PDF of y in terms of X, w, o2? (b)
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2. A professor gives students a pop quiz with 5 true or false questions. Eighty percent of the students are well-prepared for the pop quiz, but twenty percent are not. Students who are prepared have a 90% chance of answering each question correctly, but the students who are unprepared simply randomly guess and have a 50% chance. Find the
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10. 3 pts You are conducting a multinomial hypothesis test (a = 0.05) for the claim that all 5 categories are equally likely to be selected. Complete the table. Category Observed Frequency Expected Frequency A 18 B 21 C 13 D 18 9
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6. For what positive number(s) is the sum of the number and its reciprocal the smallest? In your solution, you may want to include a graph the function.

For each pair of functions f and g below, find fg (x)) and g (f(x)). Then, determine whether f and g are inverses of each other. Simplify your answers as much as possible. (Assume that your expressions are defined for all x in the domain of the composition. You do not have to indicate the domain.) ( 2 ) f ( x ) = - -, x 70 ( b ) f (x ) = 2x - 3 X
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Option 2 Explain normal distribution Thoroughly discuss an example of a variable that follows a normal distribution. State one way knowing this is useful in your professional or personal life. Elaborate on your example.

According to a dietary study, high sodium intake may be related to ulcers, stomach cancer, and migraine headaches. The human requirement for salt is only 220 milligrams per day, which is surpassed in most single servings of ready-to-eat cereals. a) If a random sample of 20 similar servings of a certain cereal has a mean sodium content of 244

Is there a relationship between neighborhood characteristics and robbery rates? A researcher interested in this relationship uses census measures of unemployment rates for a given neighborhood and police records for the rates of robbery in that neighborhood. 1.) What statistical procedure(s) should the researcher use to see if there is an

The equation, A equal to 2,400 plus quantity 1 plus 0.031 over 4 end quantity all raised to the power of 4 times t, represents the amount of money earned on a compound interest savings account. What does the value 0.031 represent? The value 0.031 represents the interest rate, which means the annual compounded interest rate is 3.1%. The value 0.031

I want know the process of this question. 4. Find the general solution to the DE y" - 8y' + 12y = 36t2 + 32 cos 2t
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The Reeves Corporation wants to assign each of its 13 corporate clients to exactly one of its 3 salespersons. The estimated annual sales potential (in $1,000,000s) 4, The Reeves Corporation wants to assign each of their 13 corporate clients to exactly one of its three salespersons. The estimated annual sales potential {in $1,000,000s) for each of
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A researcher wanted to know if friendship might affect simple sales. Two groups of students were selected. One was asked to assume the price of a particular phone if they bought it from a friend they expect to meet again. The other was asked to imagine they are buying the same phone from kijiji and state what price they would offer. The
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Calculate the five-number summary for the data set: 10, 8, 16, 24, 31, 18, 5, 19, 21, 14, 16, 22, 29, 46, 12, 14 a) minimum ______ b) Q1 ______ c) Median______ d) Q3 ________ e) Maximum _______ f) Identify the minimum data entry in the box and whisker plot ______ g) Identify the maximum data entry in the box and whisker plot ______ h) Identify the

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The data represents the heights of eruptions by a geyser. use the heights to construct a stemplot. Which plot represents a stemplot of this data? Heights- 127,96,110,150,140,110,100,130,110,126,135,116,118,129,128,120,135,130,102,141 1. 9-0,2,8 10-0,6,7 11-0,0,6 12-0,0,8 13-0,0,9 14-0,5,5 15-0,1 2. 9-6 10-0,6,6,7,8,9 11-0,0,5,5 12-0,0,1 13-0,0,2,8

Question 12 (2 points) Determine the period, amplitude, phase shift, and equation of the axis of the curve for f (x = sin 3 (x - 7) - 5
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The hello. I did my test and could u please help me to fill out this chart and then explain it to me why Topic: Weel X LFJ Test Yourse X IAT Instruct X HD 30_Stuc X LFJ Test Yourse X Take a Test X Take a Test X G what is ITA X G google tran X C A implicit.harvard.edu/implicit/Study?tid=-1 e Update M Gmail YouTube Maps G THE elevation in L... Start
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Use the International Stock Market database from "Excel Databases.xls" on Blackboard.Use Excel to develop a multiple regression model to predict the DJIA by the Nasdaq, the S&P 500, the Nikkei, the Hang Seng, the FTSE 100, and the IPC.What is the increase in the r-squared value from the best initial model (step 1) to the final model you've
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9.Researchers studying the effects of a new diet found that the weight loss over a one-month period by those on the diet was normally distributed with a mean of 9 pounds and a standard deviation of 3 pounds. a.What proportion of the dieters lost more than 12 pounds? b.What proportion of the dieters gained weight? c.If a dieter is selected at

please help solve The mean height of an adult giraffe is 18 feet. Suppose that the distribution is normally distributed with standard deviation 1 feet. Let X be the height of a randomly selected adult giraffe. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X ~ N(E,E) b. What is the median giraffe height?
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Post hoc tests in the analysis of variance are generally required when the independent variable ______. Group of answer choices has one level has two levels has three or more levels is quantitative

7. Sketch a graph of Y = 3 cos 5 X - 21 - 1 for -21 x S 21 Be sure to label the 5 key points... V V V
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A teaching assistant collected data from students in one at her classes to investigate whether study time per week (average number of hours) dittered between students in the class who planned to go to graduate school and those who did not. Complete pal (a) through (c). g Click the icon to view the data. it. Find the sample mean and standard
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1: Calculate a future cost given a learning rate The initial cost to produce a widget is estimated to be $300. The learning rate has been calculated to be 95%. a) Calculate the average cost per unit, when producing 128, using the basic theory proposed by Wright that every time production doubles, the time required (cost) will decrease by the

A rectangular prism has a 1 cm cube cut out of each of its eight corners. One of the cutouts is shown. What is the ratio of the original surface area to the new surface area?

Offer Below Asking Price 921 1019 647 631 969 1032 975 970 890 594 860 702 635 956 802 704 707 610 883 830 850 894 870 452 566 995 534 903 687 673 970 721 1163 852 1297 960 701 955 769 906 624 1232 889 836 963 852 870 826 1069 616 887 697 1036 1027 1142 447 782 975 951 1205 683 814 1016 1249 1162 1228 782 930 1273 997 878 979 1012 983 706 966 1007

Grape the line that is perpendicular to given line below 10 8 6 CO N 8 9 10 -10 -9 -8 -6 -5 -4 - 3 -2 -1 1 2 3 4 5 6 7 -1 -2 -3 -4 CH 10
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Use the normal distribution of heights of adultwomen, which has a mean of 163 centimeters and a standard deviation of 7 centimeters, and the following table with the standard scores and percentiles for a normal distribution to find the indicated quantity. The percentage of heights less than 156 centimeters is?

A group of researchers who were interested in understanding the political attitudes and behavior of all college students in the U.S . Remember that they had decided to conduct a study on the Columbia University campus, with 150 randomly selected Columbia students and ask them to answer a total of 25 questions in this survey. These researchers tell

An investigator analyzed the leading digits of the amounts from 200 checks issued by three suspect companies. The frequencies were found to be 68, 40, 18, 19, 8, 20, 6, 9, 12 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

Find the volume of the region bounded by y=x^3, y=0, x=1, and x=2 rotated about the y-axis using both the washer and shell methods. I'm getting different answers for these two.. but I know if im doing it correctly it should be the same.

Suppose that a tumor in a person's body has a spherical shape and that treatment is causing the radius of the tumor to decrease at a rate of 1 millimeter per month. At what rate is the volume decreasing when the radius is 4 mm?Recall that V =(4/3)(pi)r^3

Question 3 10 pts Find the equation of the tangent line to the function f(a:) at the point P. Show each step without using your calculator. b 1 1 1 o) - 221 P21 6x 4 37 3 Use correct mathematical symbols and show all your work using methods from lectures presented in this class only. Results need to be in exact numbers (ex: reduced radicals,
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A container contains 30 greentokens, 10 bluetokens, and 3 red tokens. Two tokens are randomly selected without replacement. ComputeP(F|E). Eyou select a green token first Fthe second token is non - green

2. Let T+ 1 w3+ x?+r+1 (a) [1p] Find ; x lim g(e" 2) if the limit exists. (b) [1p] Find the limits lim g(e 2) and lim g(e* 2) T00 Tr00 if they exist, or explain why they do not. Show all the steps
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answer the following: Q 4. Identify the focus of the parabola given by y = 4(x - 1)' + 3 O (-1, 18 ) O (1,16 ) O (1, 18) O (-1, 18 ) W Q 5. For the equation *" - 6x -y+ 10 =0, show all steps to identify: a) the vertex. b) the focus. c) the directrix. B i U Font Family AADEE EGO.1 O 1.Identify the vertex of a parabola with focus (2, 7) and
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inputs for each of the possible combinations without retyping the original equation. This prevents a lot of errors. Maxima syntax f:(h and not c) or (p and not c); (h and not c)) or (p and not c) f,h=false,c=false,p=false; false Edit and re-execute the previous line for each input combination. Record the transcript of the session going through all
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Chapter 12 Q7 See attachment For each of the following scenarios, say whether the data should be treated as independent or paired samples. Explain briefly. If paired, explain what the pairing involves. a) An efficiency expert claims that a new ergonomic desk chair makes typing at a computer terminal easier and faster. To test it, 15 volunteers are
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12. Write the equation 64 = 1296 in logarithmic form. A. log4 6 = 1296 B. logs 1296 = 4 C. log1296 6 = 4 D. log6 4 = 1296 13. A game-show spinner has 10 equal sections labeled with the digits 0 - 9. What is the probability that on two consecutive spins you get the number 15 (Spinning a 1 and then a 5)? A. - B. ( ) C. 3x 14. What are the asymptotes
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solve the problem im stuck in the question Use the factor theorem and synthetic division to decide whether the second polynomial is a factor of the first. - x3 + 3x - 18; x+3 Is x + 3 a factor of - x3 + 3x - 18? No Yes
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4 multiple choice Questions For the distribution of sh weights pictured below, what is the relationship between the mean and the median? 15 20 25 30 35 40 45 50 O The mean and median will be approximately the same 0 The mean will be greater than the median O The mean will be less than the median Which of the following numerical summaries of
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Need answers a and b, Thank you! Question 5 a. A juice company is planning an expansion. The management wishes to predict which sites are likely to be profitable. Several areas, where predictors of profitability can be identified, are: number of hotel rooms within 3km from the site (Number), distance to the nearest juice b. Comment on the
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Create a python function def grad(beta, b, xTr, yTr, C, kerneltype, kpar=1) that Calculates the gradients of the loss function with respect to beta and b. Input: beta : n-dimensional vector that stores the linear combination coefficients b : bias term, a scalar xTr : nxd dimensional data matrix (training set, each row is an input vector) yTr :

The mean pulse rate(in beats perminute) of adult males is equal to 69 bpm. For a random sample of 145 adultmales, the mean pulse rate is 67.8 bpm and the standard deviation is 11.3 bpm. Find the value of the test statistic.

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Calculate the maturity value of end-of-month payments of $3,500 made at 4.42% compounded quarterly for 6 years.

Answer The ending inventory of a company was $159,000 as per the perpetual inventory records. The current replacement cost for the ending inventory is $156,000. The journal entry to adjust inventory is O A. Cost of Goods Sold 3.000 Merchandise Inventory 3.000 O B. Merchandise Inventory 3,000 Cost of Goods Sold 3.000 O C. Cost of Goods Sold 156,000
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given the following equalities: 32 crb = 3 seg , 56 wer = 17 xcv, 3 lfj = 87 tfs, 2 wer = 21 lfj, 7 crb = 15 tfs. an experiment found that there were 51 seg . convert that number to the unit of tfs.

Good moring, This is my problem X Problem 3. A set of n cities is to be connected via communication links. the cost to construct a k between cities i and j is cy, i # j. Enough links should be constructed so that for each pair of cities there is a path of links that connects them. As a result, only n - 1 links need be constructed. A minimal cost
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Proof of the following Statement: For any n n matrix A, if A is orthogonal, then det(A) =1

You have noticed a few of the workers lack confidence in communicating with the Sudanese and have requested support in addressing this issue. Identify at least two (2) programs! activities that can be conducted, to improve workers ability to deal with Sudanese clients
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When beginning to work on Generating Ideas, you will already have which of these? Group of answer choices A broad idea of your general goal. A sequence of steps to solve a problem. At least one or two ideas that you believe are very good. A definite criterion to use to evaluate your options. A clearly defined problem statement to guide your search

Express all ratios in lowest terms. SteA cash prize of $3300 is to be awarded at a fundraiser. If 1100 tickets are sold at $8 each, find the expected value. Round your answer to the nearest cent.ve shuffled a deck of cards and asked Sally to draw one card to start a magic trick. The odds against getting a face card are

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