Solve the Problem $$f ( x ) = 0.0040 x ^ { 2 } - 0.43 x + 36.98$$

question 15

Multiple Choice

Solve the problem.
-The quadratic function $$f ( x ) = 0.0040 x ^ { 2 } - 0.43 x + 36.98$$ models the median, or average, age, y, at which U.S. men were first married x years after 1900. In which year was this average age at a minimum? (Round to the nearest
Year.) What was the average age at first marriage for that year? (Round to the nearest tenth.)

• A) 1953, 36 years old
• B) 1936, 48.5 years old
• C) 1954, 25.4 years old
• D) 1954, 48.5 years old

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