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Mathematics 6 Online
OpenStudy (anonymous):

If the formula R = -0.037t + 50.1 can be used to predict the world record in the 400 meter dash t years after 1925, for what years will the world records be 48.1 seconds or less?

OpenStudy (anonymous):

set R to 48.1 i believe.. then subtract 50.1 to the other side.. divide by -.037

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