Can someone solve this? .3 Plactice Froblems (PDF).pdf3. The graphs shows the amount of a chemlcal In a water sample at differenttimes after It was first measured.Select all statements that are true.2,4002,0001,6001,20080040024time (hours)A. The amount of the chemical in the water sample is decreasing exponentially..B. The amount of the chemical in the water sample is not decreasingexponentially.C. It is not possible to telk-for certain whether or not the amount of the chemical isdecreasing exponentlally.D. When it was first measured, there were 2,000 mg of the chemical in the watersample.E. After 4 hours, there were 100 mg of the chemical In the water.chemical (mg)

Answered: 3. The graphs shows the amount of a…

Algebra and Trigonometry (MindTap Course List)

4th Edition

ISBN:9781305071742

Author:James Stewart, Lothar Redlin, Saleem Watson

Publisher:James Stewart, Lothar Redlin, Saleem Watson

Chapter4: Exponential And Logarithmic Functions

Section4.CR: Chapter Review

Problem 12CC

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A manufacturer of printed circuit boards uses exponentialsmoothing with trend to forecast monthly demand of its product.At the end of December, the company wishes to forecast salesfor January. Th e estimate of trend through November has been200 additional boards sold per month. Average sales have beenaround 1000 units per month. Th e demand for December was1100 units. Th e company uses α = 0.20 and β = 0.10. Make aforecast including trend for the month of January.
Storrs Cycles has just started selling the new Cyclonemountain bike, with monthly sales as shown in the table. First,co-owner Bob Day wants to forecast by exponential smoothingby initially setting February’s forecast equal to January’s saleswith a = .1. Co-owner Sherry Snyder wants to use a three-periodmoving average. a) Is there a strong linear trend in sales over time?b) Fill in the table with what Bob and Sherry each forecast forMay and the earlier months, as relevant.c) Assume that May’s actual sales figure turns out to be 405.Complete the table’s columns and then calculate the meanabsolute deviation for both Bob’s and Sherry’s methods.d) Based on these calculations, which method seems moreaccurate?
A convenience store recently started to carry a new brand of soft drink. Management is interested in estimating future sales volume to determine whether it should continue to carry the new brand or replace it with another brand. The following table provides the number of cans sold per week. Use the exponential smoothing (let α=0.4 with an initial forecast for week 1 of 572) methods to forecast demand for week 13. Period 1 2 3 4 5 6 7 8 9 10 11 12 Sales 572 637 648 740 670 633 752 690 761 720 656 751 Obtain the exponential smoothing forecast. The forecast for week 13 =?is(Enter your response rounded to the nearest whole number.) Specify the mean absolute deviation (MAD) and mean absolute percent error (MAPE). (Enter your responses rounded to two…
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A convenience store recently started to carry a new brand of soft drink. Management is interested in estimating future sales volume to determine whether it should continue to carry the new brand or replace it with another brand. The following table provides the number of cans sold per week. Use the exponential smoothing (let α=0.4 with an initial forecast for week 1 of 617) methods to forecast demand for week 13. Period 1 2 3 4 5 6 7 8 9 10 11 12 Sales 617 617 648 739 659 623 742 704 724 715 668 740 Obtain the exponential smoothing forecast. The forecast for week 13 is =? nothing.(Enter your response rounded to the nearest whole number.) Specify the mean absolute deviation (MAD) and mean absolute percent error (MAPE). (Enter your responses as real…
Let' pretend that in an American city there were 2000 new cases on Monday which is a 12% decrease from two weeks ago. So it appears that new covid cases are going down (wahoo! with a two-week trend of -12%. Curious... how many new cases were there two weeks ago? (don't round for accuracy) c) Write a linear/exponential equation that models this situation (consistent with your choice above). Time is the explanatory variable, and New Covid Cases is the response variable. D. Explain what the slope/multiplier (consistent with your choice above) means in this context of the problem. Be sure to use units and to write a clear sentence. I need only parts C and D answered because I have already created a scatterplot based on the table. I have provided the information needed with images.
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Suppose that the time in minutes, Y , that an insect spends on a plant is exponentiallydistributed such that Y ∼Exp( 1/3)(a) Evaluate P(Y ≤3)(b) Evaluate P(Y > 4)(c) Evaluate P(2 < Y < 6)(d) What is the mean length of time that this insect spends on a plant?

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