Solve the Problem $$f ( x ) = 0.0039 x ^ { 2 } - 0.47 x + 36.46$$

question 225

Multiple Choice

Solve the problem.
-The quadratic function $$f ( x ) = 0.0039 x ^ { 2 } - 0.47 x + 36.46$$ 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) 1936, 50.6 years old
• B) 1960, 50.6 years old
• C) 1953, 36 years old
• D) 1960, 22.3 years old