Kord is enlarging a picture to make a banner for the football team. He plans to repeatedly enlarge the picture 125% each time until it is the size he wants for his banner. The size of his picture can be modeled by the function , where is the number of times the picture has been enlarged. Find the rate of change of the picture size between the first and third enlargement.

Find the corresponding -values for the given -values.

Use the formula to calculate the rate of change.

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