Question
Eric's timing for swimming in his first three heats were 43 s, 45 s, and 53 s. He wishes to improve his overall average timing by 1 s. What timing must he clock in the fourth heat?
2 m

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Eric's timing for swimming in his first three heats were 43 s, 45 s, and 53 s. He wishes to improve his overall average timing by 1 s. What timing must he clock in the fourth heat?