In t​ years, the population of a certain city grows from 400,000 to a size P given by P(t)=400,000+6000t2.   ​a) Find the growth​ rate, dP/dt. ​b) Find the population after 10 yr. ​c) Find the growth rate at t=10. ​d) Explain the meaning of the answer to part​ (c).

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter5: Inverse, Exponential, And Logarithmic Functions
Section5.6: Exponential And Logarithmic Equations
Problem 14E
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In t​ years, the population of a certain city grows from 400,000 to a size P given by
P(t)=400,000+6000t2.
 
​a) Find the growth​ rate, dP/dt.
​b) Find the population after 10 yr.
​c) Find the growth rate at t=10.
​d) Explain the meaning of the answer to part​ (c).
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