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QUESTION
The formula r = -0.075t+3.85 can be used to predict the world record in the 1500m run t being years after 1930.
The formula r = -0.075t+3.85 can be used to predict the world record in the 1500m run t being years after 1930. Determine (in terms o an inequality) those years for which the world record will be less than 3.5 min
