The Cobb-Douglas production function for an automobile manufacturer is 
where x is the number of units of labor and y is the number of units of capital. Estimate the average production level if the number of units of labor x varies between 200 and 250 and the number of units of capital y varies between 200 and 250. Round your answer to two decimal places.
?
A. 22,487.73
B. 22,467.73
C. 22,477.73
D. 22,498.18
E. 22,457.28
Answer: C
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Change the following number from scientific notation to decimal notation. 2.13 × 10-2
A. 0.0213 B. 213 C. 21.3 D. 2.13 E. 0.213
21
- 7
A. 70
B. 14
C. 28
D. 14
Solve the problem.An airplane is sighted at the same time by two ground observers who are 3 miles apart and both directly west of the airplane. They report the angles of elevation as 15° and 
How high is the airplane? Round to the nearest hundredth of a mile.
A. 1.17 mi B. 2.18 mi C. 3.29 mi D. 0.78 mi
Find the foci and endpoints of each axis for the given ellipse.4x2 + 16y2 = 64
A. Foci: (± 4, 0); vertices: (±2
, 0);
endpoints of the minor axis: (± 2, 0)
B. Foci: (0, ±2
); vertices: (0 , ± 4);
endpoints of the minor axis: (± 2, 0)
C. Foci: (± 12, 0); vertices: (± 16, 0);
endpoints of the minor axis: (0, ± 4)
D. Foci: (±2
, 0); vertices: (± 4, 0);
endpoints of the minor axis: (0, ± 2)