Question
Zane's timing for swimming in his first three heats were 49 s, 48 s, and 56 s. He wishes to improve his overall average timing by 3 s. What timing must he clock in the fourth heat?
2 m

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Zane's timing for swimming in his first three heats were 49 s, 48 s, and 56 s. He wishes to improve his overall average timing by 3 s. What timing must he clock in the fourth heat?