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A​ country's travel exports​ (good and services that international travelers buy while visiting the​ country) are increasing exponentially. The value of such​ exports, t years after​ 2011, can be approximated by ​V(t)equals115.31 e Superscript 0.087 t​, where V is in billions of dollars. ​a) Estimate the value of the​ country's travel exports in 2019 and 2020. ​b) Estimate the growth rate of the​ country's travel exports in 2019 and 2020.

Respuesta :

Answer:

The equation given is:

[tex]V(t) = 115.31e^{0.087t}[/tex]

Part A

As t represents the years after 2011, and we need to calculate exports in 2019 and 2020.

For 2019

t = 2019 - 2011 = 8

Substitute in the given equation:

[tex]V(8)=115.31e^{0.087((8)}\\V(8)=230.62[/tex]

For 2020

t = 2020-2011 = 9

[tex]V(9)=115.31e^{0.087((9)}\\V(9)=251.38[/tex]

Part B

First calculate V(0)

[tex]V(0)=115.31e^{0.087((0)}\\V(0)=115.31[/tex]

Formula for the growth rate is given by:

Growth Rate = (present/past)^1/t - 1

[tex]G.R=(\frac{Present}{Past})^{\frac{1}{t}}-1[/tex]

Where

Past = 115.31

Calculate Growth Rate for 2019

Present = 230.62

t = 8

Substitute in the equation of Growth rate:

[tex]G.R=(\frac{230.62}{115.31})^{\frac{1}{8}}-1\\G.R =1.09-1\\G.R = 0.09\\[/tex]

In percentage, the growth rate is:

G.R = 9.05 %

Calculate Growth Rate for 2020

Present = 251.38

t = 9

Substitute in the equation of Growth rate:

GR= 9.05%