Solve the problem.The quadratic function 
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. 1950, 26.5 years old
B. 1936, 47 years old
C. 1950, 47 years old
D. 1952, 36 years old
Answer: A
Mathematics
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Solve for the angle ?, where 0 ? ? ? 2?cos2? = 
A. ? = 0, ?, 2?
B. ? = 
, 
, 
, 
C. ? = 
, 
, 
, 
D. ? = 
, 
, 
, 
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Solve the problem.A tree 8 feet high grows at the rate of 3 feet each year. How many years will it take for the tree to grow to a height of 35 feet?
A. 9 years B. 19 years C. 14 years D. 24 years
Mathematics
Divide, if possible. If a quotient is undefined, state so.
A. -3 B. -2 C. -1 D. 2
Mathematics
Give the focus, directrix, and axis for the parabola.- 
x2 = y
A. (-20, 0), x = 10, x-axis B. (0, 10), y = -10, y-axis C. (0, -10), y = 10, y-axis D. (0, -10), y = 10, x-axis
Mathematics