Question
Glen's timing for running in his first four heats were 46 s, 52 s, 58 s, and 60 s. He wishes to improve his overall average timing by 1 s. What timing must he clock in the fifth heat?
2 m

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Glen's timing for running in his first four heats were 46 s, 52 s, 58 s, and 60 s. He wishes to improve his overall average timing by 1 s. What timing must he clock in the fifth heat?