Solve the problem.If the formula R = -0.037t + 50.1 can be used to predict the world record in the eter dash  after 1925, for what years will the world records be 48.3 seconds or less?

A. 1973 or after
B. 1975 or after
C. 1949 or after
D. 1974 or after


Answer: D

Mathematics

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