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This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

The square root of 9x plus 7 plus the square rot of 2x equall to 7

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500