K-3 3. Suppose a person carrying a virus returns to an isolated groupof 100 persons. Assume that the day rate at which the virusspreads out is proportional to the multiplication of the numberof infected persons and the number of non-infected persons. Itis observed that the number of infected persons is 7 after 4days. Determine the number of infected persons after 10 days.{60 persons after truncation}

Answered: Image /qna-images/answer/5fc9f1ab-7a75-4680-bade-5cbeb1b37ba1.jpg

Answered: 3. Suppose a person carrying a virus…

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter4: Polynomial And Rational Functions

Section4.6: Rational Functions

Problem 11SC: Find the mean hourly cost when the cell phone described above is used for 240 minutes.

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Find the mean hourly cost when the cell phone described above is used for 240 minutes.
Suppose that “X” represents the name of a disease. An epidemiologist conducts a survey of disease “X” in a population. The prevalence of disease “X” among women is 40/1,000 and among men is 20/1,000. Assuming that the data have been age-adjusted, is it correct to conclude that women have twice the risk of disease “X” as men? Explain.
One operation of a mill is to cut pieces of steel into parts that are used in the frame for front seats in an automobile. The steel is cut with a diamond saw, and the resulting parts must be cut to be within 0.005 inch of the length specified by the automobile company. The measurement reported from a sample of 100 steel parts (stored in “Assignment 2 – Steel.xlsx” ) is the difference, in inches, between the actual length of the steel part, as measured by a laser measurement device, and the specified length of the steel part. For example, the first observation, -0.002, represents a steel part that is 0.002 inch shorter than the specified length. -0.0042 0.0057 0.0031 -0.0085 -0.0087 0.0083 0.0035 -0.0070 0.0040 0.0080 0.0094 -0.0036 -0.0067 0.0052 0.0100 -0.0010 0.0077 0.0010 -0.0060 -0.0025 -0.0022 -0.0097 0.0047 0.0060 0.0006 -0.0044 0.0015 0.0089 -0.0039 -0.0064 -0.0046 -0.0096 0.0021 -0.0071 -0.0020 0.0009 -0.0028 -0.0060 0.0001 -0.0057 -0.0062 0.0054 0.0061 0.0090 0.0004 0.0051…
A campus researcher asked a random sample of 8 students about how many hours they work per week on average and their grade in their last math course. She then made a table for hours worked per week ? and their last math class score ?. a. Compute Sxx, Sxy, and Syy. b. Compute SST, SSR, and SSE. c. Compute the coefficient of determination, r^2. Round to four decimal places as needed. d. Determine the percentage of variation in the observed values of the response variable explained by the regression. e. State how useful the regression equation appears to be for making predictions.(circle)NOT VERY USEFUL VERY USEFUL f. Find the regression equation. Round to four decimal places as needed
Suppose that we identify 155 women 50 to 54 years of age who have both a mother and a sister with a history of breast cancer. 18 of these women themselves have developed breast cancer at some time in their lives. If we assume that the proportion of breast cancer cases in women whose mothers have had breast cancer is 8%, does having a sister with the disease increase the risk? Find the p-value.
-20= z/10 -22
For the past month, 60 new cases of a disease were added to an existing 540 cases. If 2500 people are at risk at contracting the disease for that month. What is the prevalence rate?
For a sample of 10 individuals, a researcher calculates residuals for the relationship between “number of delinquent friends” and “number of prior arrests” and finds that the positive residuals = 125. The researcher then collects a second sample of 10 individuals and calculates the residuals on the same two variables and discovers the sum of the positive residuals = 75. What can you conclude about the strength of the relationship between “number of delinquent peers” and “number of prior arrests” across these two random samples? How are they similar/different?
_9. The mean annual income of workers who are college graduates is greater than Php 100,000 a year. A. H.:µ 100,000 В. Н.: и> 100,000 & HA: и 84 В. Н.: 3D 84 & HA: и 19 Β. H : μ 19 & Η μ 1,500,000 C. H.: µ = 1,500,000 & HẠ: µ > 1,500,000 B. H.:µ = 1,500,000 & HA: µ + 1,500,000 D. H.: µ = 1,500,000 & HA: µ 100,000 & Нд: иS 100,000 С. Н.: и %3D 84 & HA: # 84 D. H.: µ = 84 & H4: µ < 84 C. H.: μ= 19 & HA: μ# 19 D. H : μ 60 & HA: μ< 60
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The median age at first marriage of US Woman (26.1 years) is what percentage less than the median age at first marriage of US men (28.2 years)?
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