Posted: August 4th, 2022

Maths -In a certain country, the percentage of the population relocating

In a certain country, the percentage of the population relocating from one town to another town in that same country is given by the following 

function: 

( ) 

Time is zero (t = 0) corresponds to the year 1960. The population of the entire country should be considered a constant. 

1. Find the rate at which people relocated during the year of your birth. (If 

you were born before 1960, please use 1960 as your birth-year) 

2. Find the relocation rate of today. 

What does this tell you about the country’s population? Is there a peak 

(max) relocation year? Do you think this model is appropriate for predicting population movement? Why or why not? 

1. Find the derivative for the following: 

a. y = x^2e^x

b. y = (e^x + 2)^3/2

c. Y = e^-3x

d. y = e^-e ^-x/2

2. The present value of a building in the downtown area is given by the 

function P(t) = 300,00e^-0.09t+vt/2 f or 0< t < 10 Find the optimal present value of the building. (Hint: Use a graphing  utility to graph the function, P(t), and find the value of t0 that gives a point on the graph, (t0, P(t0)), where the slope of the tangent line is 0.)  3. Find the equation of the line tangent to f(x) = xe^-x, at the point where x= 0. What does this tell you about the behavior of the graph when x = 0? 4. The unit selling price p (in dollars) and the quantity demanded x (in pairs) of a certain brand  of women’s shoes are given by the demand equation P(x) = 100e^-0.0001x f or 0 < x < 20,000 a. Find the revenue function, R. (Hint: R(x) = x(p(x)), since the revenue function is the unit selling price at a demand level of x units times the number of units demanded.)  b. Find the marginal revenue function, R’ c. What is the marginal revenue when, x = 10?

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