A town library estimates that, when the population is x thousand persons, approximately y thousand books will
Question:
A town library estimates that, when the population is x thousand persons, approximately y thousand books will be checked out of the library during 1 year, where x and y are related by the equation y3 - 8000x2 = 0.
(a) Use implicit differentiation to find a formula for dy/dx, the rate of change of library circulation with respect to population size.
(b) Find the value of dy/dx when x = 27 thousand persons and y = 180 thousand books per year.
(c) Assume that x and y are both differentiable functions of time t, and use the method of related rates to find a formula for dy/dt , the time rate of change of library circulation.
(d) Compute dy/dt when x = 27, y = 180, and the population is rising at the rate of 1.8 thousand persons per year
Either use part (c) or use part (b) and the chain rule.
Step by Step Answer:
Calculus And Its Applications
ISBN: 9780134437774
14th Edition
Authors: Larry Goldstein, David Lay, David Schneider, Nakhle Asmar