PLS HELP!!!!!!!!!!

A scientist is studying the growth of a particular species of plant. He writes the following equation to show the height of the plant f(n), in cm, after n days:

f(n) = 12(1.03)n

Part A: When the scientist concluded his study, the height of the plant was approximately 16.13 cm. 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(n) represent? (2 points)

Part C: What is the average rate of change of the function f(n) from n = 3 to n = 10, and what does it represent? (4 points)

Question

PLS HELP!!!!!!!!!!

A scientist is studying the growth of a particular species of plant. He writes the following equation to show the height of the plant f(n), in cm, after n days:

f(n) = 12(1.03)n

Part A: When the scientist concluded his study, the height of the plant was approximately 16.13 cm. 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(n) represent? (2 points)

Part C: What is the average rate of change of the function f(n) from n = 3 to n = 10, and what does it represent? (4 points)

anonymous · Answer

I just need B & C.

campbell_st · Answer

so n is a time.... what is the 1st n value you can use...?

anonymous · Answer

2

campbell_st · Answer

nope... this about the question 

|dw:1447450081620:dw|

anonymous · Answer

Ok, I think I get it

campbell_st · Answer

so what do you think the answer is to B..?

anonymous · Answer

btw What will be A just to check

anonymous · Answer

To B, 12?

campbell_st · Answer

just have a look at the graph.... what n values have I shown.... its time.... it can only be______________

campbell_st · Answer

well in part B... you are being asked what the 12 represents...... not just what number is it

anonymous · Answer

Ok, A is where I'm stuck the most

campbell_st · Answer

ok... A.. you are graphing height against time.... 

can time be negative,.....?

anonymous · Answer

No

anonymous · Answer

Hello?

campbell_st · Answer

can the time be zero...?

anonymous · Answer

Sorry It showed you left

anonymous · Answer

yes

campbell_st · Answer

so now you know that the time values n... or the domain can be zero or a positive number.... so that should help to get the domain...

anonymous · Answer

Ok

campbell_st · Answer

now B ... you said the y-intercept is 12.... 

but you are asked, what it means... 

any ideas..?

anonymous · Answer

It means the original height.

campbell_st · Answer

well I'd say initial height... so the plant was 12 high when the study was started... 

initial height = 12 when n = 0

campbell_st · Answer

now C

do you need a hand with that..?

anonymous · Answer

I got thank so much for helping

campbell_st · Answer

ok... glad to help