The speeds of a baseball pitcher's fastballs are normally distributed, with a mean of 160 km/h and a standard deviation of 7 km/h. What is the probability that a random fastball exceeds 170 km/h?

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A: The given equation is 4x+3=102x-1

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A: Let's find.

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Q: Find AB.

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A: To explain that the given answer is correct or not.