PLEASE IM BEGGING! HELP!
A biologist is studying the growth of a particular species of algae. She writes the following equation to show the radius of the algae, f(d), in mm, after d days: f(d) = 11(1.01)^d
Part A: When the biologist concluded her study, the radius of the algae was approximately 11.79 mm. What is a reasonable domain to plot the growth function? (4 points)
Part B: What does the y-intercept of the graph of the function f(d) represent? (2 points)
Part C: What is the average rate of change of the function f(d) from d = 2 to d = 7, and what does it represent? (4 points)how and why the concept of private property developed

Respuesta :

In this case, a reasonable domain to plot the growth function - 6.97, the y-intercept of the graph of the function f(d) represent = 11 (initial numbers), and the average rate of change of the function f(d) from d = 2 to d = 7 = 0.11447.

Given:

f(d) = 11[tex](1.01)^{d}[/tex]  

Part A:  

f(d) = 11.79  

11.79=11[tex](1.01)^{d}[/tex]  

[tex](1.01)^{d}[/tex] = 11.79/11  

[tex](1.01)^{d}[/tex] = 1.071818  

d = [tex]\frac{log 1.071818}{log 1.01}[/tex]  

d = 6.97

 

Part B:  

y- intercept is obtained when domain = 0  

d = 0 ⇒ f(0)

= 11(1.01)⁰

= 11*1 = 11  

f(d) = 11

Part C:  

The average rate of change -  

[tex]Rate \ of \ change = \frac{\partial }{\partial d} f(d)\\ = \frac{\partial}{\partial d} (1.01)^d .11\\ = 11(1.01)^d \ log (1.01)\\Average \ rate \ of \ change = \frac{\int\limits^7_2 \frac{\partial f(d)}{\partial d} \partial d}{\int\limits^7_2 \partial d } \\= \frac{\int_{2}^{7} 11(1.01)^d log_e 1.01 \ \partial d}{\int_{2}^{7} \partial d}\\= \frac{11 log_2 1.01}{5} \int_{2}^{7} 1.01^d \partial d\\= \frac{11}{5} log_e 1.01\times [\frac{1.01^d}{log_e(1.01)}]_2^7\\[/tex]

[tex]= \frac{11}{5}[1.01^7-1.01^2]\\= \frac{11}{5}\times 0.05203\\= 0.11447 \ mm/day[/tex]

Thus, a reasonable domain to plot the growth function - 6.97, the y-intercept of the graph of the function f(d) represent = 11 (initial numbers), and the average rate of change of the function f(d) from d = 2 to d = 7 = 0.11447.

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