This is similar to Problem 7 from you Section 2.3 (part 2) worksheet.

Two dogs, Ozzy and Millie, start at the same place and run in the same direction parallel to one another. Millie runs $20$ feet per second and Ozzy runs $38$ feet per second. After how many seconds will they be $100$ feet apart?

They will be $100$ feet apart after seconds.

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