math —— Numerical analysis problems 4. The concentration c of a radioactive material decays according to the law c(t) = be¯atwhere t represents time in seconds, a = 0.1 sec¯¹, and b is the initial concentration.a) Using the Least Squares method and the data table (Table 1) below find b. b)ti (sec)1234Ci0.910.800.760.65Table 1:Find the error in the least squares approximation.

As per the question we are given a data table in ti(x) and Ci(y) and we have to fit the curve of the…

Answered: The concentration c of a radioactive…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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AAAAAAA Number of People Killed 3.50 300 250 200 150 100 50 0 -50 -100 -150 4 5 6 Magnitude of Earthquake 12 The relationship between the magnitude of the earthquake and the number of people killed is influenced by the country in which the earthquake takes place. Some countries have building codes that produce buildings that better withstand the damage of an earthquake than buildings in some other countries. In this scenario, the country in which an earthquake takes place is which of the following? Extrapolation Outlier Lurking variable Residual Influential Observation 3 7 10 -
Example 4
The final grade in a particular course is determined by grades on the midterm and final. The grades for five students and the two grading systems are modeled by the following matrices. Call the first matrix A and the second B. Complete parts (a) and (b). Click to view the matrices. a. Describe the grading system that is represented by matrix B. Grading system 1 assigns 50% of the final grade to the midterm and 50% of the final grade to the final. Grading system 2 assigns 20% of the final grade to the midterm and 80% of the final grade to the final. b. Compute the matrix AB and assign each of the five students a final course grade first using system 1 and then using system 2. (89.5-100=A, 79.5-89.4 = B, 69.5-79.4 = C, 59.5-69.4D, below 59.5 = F) Grade System 1 System 2 ... Student 1 Student 2 Student 3 Student 4 Student 5 (Type A, B, C, D, or F.)
$$0!$$ is equal to $$10$$ O $$o$$ $$1$$ O $$20$$
Beginning Inventory $11,500 Daily Alternative Purchases (+) $1,000 Produce Purchases (+) $550 Protein Purchases (+) $1,000 Dry Goods Purchases (+) $1,000 Total Available = $15,050 Ending Inventory (-) $10,900 Food Cost (COGS) (=) $4,100 Revenue (Sales) (+) $12,500 Food Cost % (=) 32.8% If the Revenue (sales) decreases and everything else remains the same, what happens to the Food Cost percentage? a. Food cost % increases because the ratio of food cost to revenue will be higher b. Food cost % decreases because the ratio of food cost to revenue will be higher c. Food cost % increases because the ratio of food cost to revenue will be lower d. Food cost % decreases because the ratio of food cost to revenue will be lower
Statistics question: a sample of 25 families was taken for a study. the objective of the study was to estimate the factors that determine the monthly expenditure (in dollars) on food for families. the independent variables included in the analysis were the number of members in the family (x1), the number of meals eaten outside (x2), and a dummy variable (x3) that equals 1 if a family member is on a diet and equals 0 if there is no family member on a diet. the following regression results were obtained. coefficients standard error intercept 450.08 53.6 x1 49.92 9.6 x2 10.12 2.2 x3 -.60 12.0 ANOVA df SS MS regression…
Answers and explanation
Section 5-6 34.32 Simplify and write the answer in exponential notation. Page # book: 219 8 chapter:5-61 Exercise# 11 Note: Power (exponential) rules, product of powers, the same bases.
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