Find the angle between v and w. Round your answer to one decimal place, if necessary.v = -5i + 7j,
w = -6i - 4j
A. 20.7°
B. 90.9°
C. 88.2°
D. 110.8°
Answer: C
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The circular ring has an inner radius of 2 and outer radius of 5.
The circular ring shown is a gnomon to
A. another circular ring with inner radius 5 and outer radius 12.5. B. a circular disk of radius 2. C. another circular ring with inner radius 2 and outer radius 5. D. a circular disk of radius 5. E. none of these
Find the exact value under the given conditions.Given sin ? = - 
, with ? in quadrant IV, and tan ? = - 
, with ? in quadrant II. Find cos (? + ?).
A. - 
B. 
C. 
D. - 
Solve the problem.Suppose the following matrix represents the input-output matrix of a simplified economy that involves just three commodity categories: manufacturing, agriculture, and transportation. How many units of each commodity should be produced to satisfy a demand of 900 units for each commodity?
A. 2259 units of manufacturing, 2097 units of agriculture, and 2241 units of transportation B. 2520 units of manufacturing, 2097 units of agriculture, and 2259 units of transportation C. 2241 units of manufacturing, 2538 units of agriculture, and 2097 units of transportation D. 2259 units of manufacturing, 2520 units of agriculture, and 2097 units of transportation
Evaluate.-st, for s = 
and t = 
A. - 13
B. - 13
C. 13
D. 13