Question
Zane's timing for running in his first four heats were 55 s, 40 s, 53 s, and 44 s. He wishes to improve his overall average timing by 2 s. What timing must he clock in the fifth heat?
2 m

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Zane's timing for running in his first four heats were 55 s, 40 s, 53 s, and 44 s. He wishes to improve his overall average timing by 2 s. What timing must he clock in the fifth heat?