math
posted by gt .
robby runs for 5 minutes . he walks for 10 minutes . he runs for 7 minutes. he walks another 4 minutes .he runs again for 8 minutes and walk againfor 3 minutes .what is the range of minutes robby runs?

5, 7, 8
8  5 = ?
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robby runs for 5 minutes. He walks for 10 minutes. He runs for 7 minutes. He walks another 4 minutes. He runs again for 8 minutes and walks again for 3 minutes. what is the range of minutes robby runs?