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. 1953, 36 years old
B. 1965, 51.6 years old
C. 1965, 21 years old
D. 1936, 51.6 years old
Answer: C
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Match the surface show below to the graph of its level curves.
A. 
B. 
C. 
D. 
Solve the problem.Jimmy is a partner in an Internet-based coffee supplier. The company offers gourmet coffee beans for $12 per pound and regular coffee beans for $4 per pound. Jimmy is creating a medium-price product that will sell for $6 per pound. The first thing to go into the mixing bin was 20 pounds of the gourmet beans. How many pounds of the less expensive regular beans should be added?
A. 62 lb B. 59 lb C. 60 lb D. 61 lb
Solve the problem.Find the point on the sphere 
that is closest to the point 
A. 
B. 
C. 
D. 
Solve the problem.A ball is thrown downward from a window in a tall building. Its position at time t in seconds is 
where s is in feet. How long will it take the ball to fall 174 feet?
A. 5.8 sec B. 2.4 sec C. 3.3 sec D. 2.2 sec