Question

Tori has a cell phone plan that charges $0.09 for each text message sent. Tori plans to spend no more than $40 per month on her texting bill. If c(t)=0.09t represents the total phone bill based on the number of texts (t) that tori sends each month, what is the domain of the function?

Answer 1

The domain of the function c(t) = 0.09t is 0 < t < 444, so that he spend no more than $40 per month on her texting bill.

What is an equation?

An equation is an expression that shows the relationship between two or more numbers and variables.

Let c(t) represents the total phone bill based on the number of texts (t). Since:

c(t) = 0.09t and c ≤ $40, hence:

40 = 0.09t

t = 444

The domain of the function c(t) = 0.09t is 0 < t < 444, so that he spend no more than $40 per month on her texting bill.

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