Concept explainers
To write: a function to represent the advertising costs.
Answer to Problem 25PPS
A function to represent the advertising costsis
Explanation of Solution
Given:
10 words cost $7.50.
15 words cost $8.75.
20 words cost $10.00.
25 words cost $11.25.
Calculation:
First find the common difference between sequential cost.
Subtract 0.25 nine times from the tenth term to find the first term.
Use the equation for the nth term of an arithmetic sequence to write a function using first term 5.25 and common difference 0.25
Hence, a function to represent the advertising costs is
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