Question
Bobby's timing for swimming in his first four heats were 53 s, 60 s, 40 s, and 55 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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Bobby's timing for swimming in his first four heats were 53 s, 60 s, 40 s, and 55 s. He wishes to improve his overall average timing by 1 s. What timing must he clock in the fifth heat?