Lola plans to publish a magazine. She cannot publish unless she sells at least 100 subscriptions. Each subscription costs $20. The function R(s) = 20s represents the amount of revenue she takes in where s is the number of subscribers. What is the domain of R(s) in this context?

R(s),

Step-by-step explanation:

The function R(s) = 20s

She needs to sell at least 100 subscriptions, so the least amount she wants to have is: 20*100 = $2000  

Hence, is the domain of R(s) in this context

R(s)

Hope it will find you well

Positive:  

Negative:

Step-by-step explanation:

The graph represents a parabola that has a maximum vertex at (1,4).

The portion of the graph above the x-axis is considered positive

For , the function is positive.

We can write this in interval notation as:

For or , the function is negative.

We can write this in interval notation as: