you look at a local newspaper to post your advertisement. you find it is going to cost you $50 for the first 200 words. Anything over 200 words will be an additional $0.05 per word. You've used 84 words. Write this as a piecewise function.

f (x) = { cost = 50 0 ≤ x ≤ 200

cost = ((x-200) * 0.05) + 50 x > 200 }

Step-by-step explanation:

Given that,

First 200 words cost = $50

Anything over 200 words = $0.05 per word.

While writing a piecewise function, keep in mind that each piece of a piecewise defined function has its own domain, so we'll also have to set-up an equation for each.

Suppose 'x' represent number of words.

f (x) = { cost = 50 0 ≤ x ≤ 200 cost = ((x-200) * 0.05) + 50 x > 200 }