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Solve the Problem R=−0.037t+50.1R=-0.037 t+50.1 Can Be Used to Predict the World Record in the Used

Question 219

Multiple Choice

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


A) 1955 or after
B) 1979 or after
C) 1980 or after
D) 1981 or after

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