The Consumer Price Index (CPI) of one particular country can be modeled by I ( t ) =-0.053t3 +0.94t2 +1.49t +584 (0 ≤ t ≤ 10) where t is time in months since the start of January 2015. What was the inflation rate in July 2015 (t = 6)? Round your percent to 2 decimal places.

College Algebra
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ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter6: Exponential And Logarithmic Functions
Section: Chapter Questions
Problem 8RE: Suppose an investment account is opened with aninitial deposit of 10,500 earning 6.25...
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The Consumer Price Index (CPI) of one particular country can be modeled by I ( t ) =-0.053t3 +0.94t2 +1.49t +584 (0 ≤ t ≤ 10) where t is time in months since the start of January 2015.

What was the inflation rate in July 2015 (t = 6)? Round your percent to 2 decimal places.

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Step 1

Consider the given:

It=-0.053t3+0.94t2+1.49t+584Find the Inflation rate:I't=ddt-0.053t3+0.94t2+1.49t+584I't=-ddt0.053t3+ddt0.94t2+ddt1.49t+ddt584I't=-0.159t2+1.88t+1.49+0I't=-0.159t2+1.88t+1.49

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