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. 1936, 47.9 years old
B. 1952, 36 years old
C. 1952, 47.9 years old
D. 1952, 24.8 years old
Answer: D
Mathematics
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Find the Jacobian 
or 
(as appropriate) using the given equations.
A. 42u2 B. 42v2 C. 84u2 D. 84v2
Mathematics
Round the number to the nearest ten, nearest hundred, and nearest thousand.4490
A.
| Ten | 4500 |
| Hundred | 4500 |
| Thousand | 4000 |
B.
| Ten | 4490 |
| Hundred | 4500 |
| Thousand | 4000 |
C.
| Ten | 4490 |
| Hundred | 4400 |
| Thousand | 4000 |
D.
| Ten | 4500 |
| Hundred | 4400 |
| Thousand | 5000 |
Mathematics
Write the first six terms of the geometric sequence with first term, a1, and common ratio, r.a1 = - 
, r = -4
A. - 
, - 
, - 
, - 
, - 
, - 
B. - 
, 
, - 
, 
, - 
, 
C. 
, - 
, 
, - 
, 
, - 
D. - 
, - 
, 
, - 
, 
, - 
Mathematics
Find the third derivative of the function.
?
What will be an ideal response?
Mathematics