Question

(FAN AND MEDAL) help please!
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) = 8(1.05)n

Part A: When the scientist concluded his study, the height of the plant was approximately 11.26 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 = 2 to n = 6, and what does it represent? (4 points)

Answer 1

@pinkbubbles @ganeshie8????

Answer 2

@heretohelpalways Of course it would xD

Answer 3

k

Answer 4

Are you still there?

Answer 5

i need help ?

Answer 6

Ok

Answer 7

well review this and the explanations

Answer 8

Part A:
Domain will be talking about the values of n.
Now when we solve for f(n) = 11.26 we get 7.005... so a reasonable range to plot the graph would be from n = 0 to 8

Part B:
The y-intercept is the point where n = 0. But n represents the number of days, i.e. time elapsed. So at n = 0 the point represents the initial reading.

Part C:
At n = 2, f(2) = 8*(1.05)^2 = 8.82
At n = 6, f(6) = 8*(1.05)^6 = 10.72
The average rate of change is (change in height)/(change in n)
The change in height is 10.72 - 8.82 = 1.9
The change in n is 6 - 2 = 4
So the average rate of change is 1.9/4 = 0.475
But what is the average rate of change? It is the average daily (because a single change in n corresponds to a day) growth of the plant (because f(n) represents height)

Enjoy :)

Answer 9

thats the answers?

Answer 10

yes

Answer 11

You there?

Answer 12

yes, i just ant to make sure, because this work value 30 pts

Answer 13

keystone? what grade are you in?

Answer 14

im curious

Answer 15

now, im 10

Answer 16

Ok :P

Answer 17

u know somebody how can check the answers?

Answer 18

well here us this for reviews as well
openstudy.com/study#/updates/54047052e4b0f2ed1e143b0f
could be useful

Answer 19

ok thank you!!!

Answer 20

No prob :)

Answer 21

You can close this question after your done giving me a fan and medal AHEM i mean getting your answers :P