Question

Kim is studying the sale of a particular brand of cereals from the year 2000 to 2010. She writes the following function to model the sale of the cereal S(t) in million dollars after t years:
S(t) = t^2 + 7t + 69

What does the yintercept of the graph of the function represent.

What is the reasonable domain.

What is the average rate of change from 1 to 4.

Answer 1

I REALLY REALLY NEED HELP ON THE DOMAIN I DID THE OTHER TWO

Answer 2

@DecentNabeel

Answer 3

\[\mathrm{Domain\:of\:}\:t^2+7t+69\::\quad \begin{bmatrix}\mathrm{Solution:}\: & \:-\infty \:<t<\infty \\\:\mathrm{Interval\:Notation:} & \:\left(-\infty \:,\:\infty \:\right)\end{bmatrix}\]

Answer 4

How do you know

Answer 5

So all real numbers

Answer 6

yes

Answer 7

Ok thanks so much

Answer 8

wellcome :)

Answer 9

@zepdrix