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 47.8 seconds or less?

A. t > 1963
B. t > 1989
C. t ? 1987
D. t ? 1988


Answer: D

Mathematics

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A.

B.

C.

D.

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