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 1300 units for each commodity?
A. 3237 units of manufacturing, 3666 units of agriculture, and 3029 units of transportation
B. 3263 units of manufacturing, 3029 units of agriculture, and 3237 units of transportation
C. 3640 units of manufacturing, 3029 units of agriculture, and 3263 units of transportation
D. 3263 units of manufacturing, 3640 units of agriculture, and 3029 units of transportation
Answer: A
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Use the guidelines to evaluate the study. From the information given, what is the biggest flaw in the study?You would like to know if the customers of your video store are satisfied. You hand a customer satisfaction questionnaire to every customer who comes into the store and ask them to fill it out and place it in a box after they check out. The questionnaire asks customers to rate their satisfaction on a scale of 1-10 with regard to the video selection and customer service.
A. Wording of the questions B. Participation Bias C. Selection Bias D. Confounding variables E. Setting may not encourage honest responses
Find the volume of the solid. Use 
for ?.
A. 3182
cu yd
B. 176
cu yd
C. 707
cu yd
D. 12728
cu yd
Find the vertex, the focus, and the directrix of the parabola.y = x2 + 10x + 26
A. V: (-5, 1); F 
; D: x = 
B. V: (-5, 1); F 
; D: y = 
C. V: (-5, 1); F (-5, 2); D: y = 0
D. V: (-5, 1); F 
; D: y = 
Name the property illustrated.9(x + 5) = 9x + 9 ? 5
A. Identity property B. Associative property C. Commutative property D. Distributive property