7. Answer all of the questions a) The cost of first-class postage stamp was 5¢ in 1965 and 50¢ in 2010. This increase represents exponential growth. Write the function Sfor the cost of a stamp t years after 1965 (t=0).b) What was the growth rate in the cost?c) Predict the cost of a first-class postage stamp in 2013, 2016, and 2019.d) The Forever Stamp is always valid as first-class postage on standard envelopes weighing 1 oumee or less, regardless of any subsequentincreases in the first-class rate. An advertising firm spent $5000 on 10,000 first-class postage samps in 2009. Knowing it will need 10,000first-class stamps in each of the years 2010-2020, it decides at the beginning of 2010 to try to save money by spending $5000 on 10,000Forever Stamps, but also buying enough of the stamps to cover the years 2011 through 2020. Assuming there is a postage increase ineach of the years 2013, 2016, and 2019 to the cost predicted in part (c), how much money will the firm save by buying the stamps?a) Choose the correct answer below.OA. S(t)=5e"ktO B.S(t) = 0.05 e50t0.05tS(t) = 5eOD. S()=0.05 etHelp me solve thisView an exampleGet more help-Clear allCheck answer

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a) The cost of first-class postage stamp was 5¢ in 1965 and 50¢ in 2010. This increase represents exponential growth. Write the function S for the cost of a stamp t years after 1965 (t=0). b) What was the growth rate in the cost? c) Predict the cost of a first-class postage stamp in 2013, 2016, and 2019.

a) The cost of first-class postage stamp was 5¢ in 1965 and 50¢ in 2010. This increase represents exponential growth. Write the function S for the cost of a stamp t years after 1965 (t=0). b) What was the growth rate in the cost? c) Predict the cost of a first-class postage stamp in 2013, 2016, and 2019.

Calculus: Early Transcendentals

8th Edition

ISBN:9781285741550

Author:James Stewart

Publisher:James Stewart

Chapter1: Functions And Models

Section: Chapter Questions

Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...

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