Question

In: Advanced Math

The total number of people infected with a virus often grows like a logistic curve. Suppose...

The total number of people infected with a virus often grows like a logistic curve. Suppose that 20 people originally have the virus, and that in the early stages of the virus (with time, t, measured in weeks), the number of people infected is increasing exponentially with r=1.8. It is estimated that, in the long run, approximately 6250 people become infected.

(a) Use this information to write down a logistic differential equation for population P

dP/dt=

Then find the solution:

P=

(b) Sketch a graph of your solution. Use your graph to estimate the length of time until the rate at which people are becoming infected starts to decrease. What is the vertical coordinate at this point? vertical coordinate =

(In practice, it may be easier to plot your answer for dP/dt instead, and pick the value of P for which it is maximal.)

Solutions

Expert Solution


Related Solutions

a virus is spreading on a small deserted island. The total number of people infected by...
a virus is spreading on a small deserted island. The total number of people infected by the virus t days after the outbreak is given by the model p(t)=5200/(1+20^(-t+15)). the different parts can be solved independently. a. How many people will be infected in the long run? (hint: compute the limit of p as t goes too infinity.) b. The island only has a small hospital with a capacity of 250 patients. When will the total number of infections reach...
The measles virus is very contagious. 13 people per 100,000 infected with the virus die. However,...
The measles virus is very contagious. 13 people per 100,000 infected with the virus die. However, once a person has been successfully vaccinated, they cannot be seriously harmed by the virus. Unfortunately, vaccination involves an injection of a weakened form of the virus, which means there is a 0.01% chance that a person can die due to the vaccination process itself. From the perspective of total welfare, should measles vaccinations be made compulsory. Why or why not?
In a population of 200,000 people, 40,000 are infected with a virus. After a person becomes...
In a population of 200,000 people, 40,000 are infected with a virus. After a person becomes infected and then recovers, the person is immune (cannot become infected again). Of the people who are infected, 5% will die each year and the others will recover. Of the people who have never been infected, 35% will become infected each year. How many people will be infected in 4 years? (Round your answer to the nearest whole number.) ________ people
Most people who are infected with the HTLV-1 virus are asymptomatic carriers. One specific subtype of...
Most people who are infected with the HTLV-1 virus are asymptomatic carriers. One specific subtype of HTLV-I occurs only in a sub-population of the Japanese population and among the native peoples of the Andes mountain area of northern Chile. The researchers are looking for the presence of HTLV-1 DNA in the bone marrow cells of well-preserved Andean mummies. The presence of HTLV-1 DNA in the mummies, of the same subtype observed in Japan, would indicate that some of the first...
Suppose people get infected by Coronavirus according to a Poisson process with rate λ > 0...
Suppose people get infected by Coronavirus according to a Poisson process with rate λ > 0 and λ denoting the average number of infected people per day. (a) (10 points) Find the expected time the 100th infected person will be identified. (b) (10 points) Find the probability that the elapsed time between infected persons 10th and 11th exceeds two days.
1. Counting the number of people who have been exposed to the Zika virus is an...
1. Counting the number of people who have been exposed to the Zika virus is an example of which of the following? Continuous data Discrete data Quantitative data Binary data unanswered 2.Which type of bait catches the largest fish? A study was conducted using 3 different baits (worms, corn, and plastic lures), and the average weight of the fish caught was measured. What is the independent variable? The type of bait The weight of the fish Corn None of the...
Consider the Malthusian model. Suppose the Influenza virus killed 10% of the people in an economy....
Consider the Malthusian model. Suppose the Influenza virus killed 10% of the people in an economy. Using a diagram, determine the long run (i.e., steady state) effects of this on the consumption per work, land per worker, and population. Graph the transition paths for consumption per worker and population from the old steady state to the new steady state.
Consider the Malthusian model. Suppose the Influenza virus killed 10% of the people in an economy....
Consider the Malthusian model. Suppose the Influenza virus killed 10% of the people in an economy. Using a diagram, determine the long run (i.e., steady state) effects of this on the consumption per work, land per worker, and population. Graph the transition paths for consumption per worker and population from the old steady state to the new steady state. Please give me the analysis process and diagram, thanks
When forecasting the number of infected people from COVID-19, what kind of forecasting model you think...
When forecasting the number of infected people from COVID-19, what kind of forecasting model you think would be appropriate? For example, exponential smoothing, linear trend, or moving average. Please choose one or more and elaborate the reasons that you think your selected forecasting model is appropriate. Finally, what is your forecasted number of infected people from COVID-19 based on your selected forecasting model? Please explain your reasons / procedures to get your forecasted number.
Suppose that the total carbohydrates in the listed cereals are approximated by a normal curve with...
Suppose that the total carbohydrates in the listed cereals are approximated by a normal curve with a mean of 30.7931 and a standard deviation of 8.8858. What is the probability that a randomly selected cereal has at most 25 grams of carbohydrates? What is the probability that a randomly selected cereal has at least 45 grams of carbohydrates? What is the probability that a randomly selected Kellogg’s cereal has between 30 and 40 grams of carbohydrates? What amount of carbohydrates...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT