Solve the problem.The input-output matrix for an economy is Agri. Mfg. 
The demand matrix is D = 
Find the internal consumption.
A. 274.2 units of agriculture and 307.0 units of manufacturing
B. 507.2 units of agriculture and 57.0 units of manufacturing
C. 374.2 units of agriculture and 397.3 units of manufacturing
D. 161.5 units of agriculture and 108.3 units of manufacturing
Answer: A
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Find the exact value of the expression.
A. 
B. 
C. - 
D. - 
Represent the vector in the form v = ai + bj whose magnitude and direction angle are given.
= 14; ? = 270°
A. v = -14i - 14j
B. v = -14j
C. v = -14i
D. v = 14
Solve the problem.A formula for calculating the distance, d, that can be seen from an airplane to the horizon is 
where x is the altitude of the plane in feet. Find d when the altitude is 21,710 feet. Round your answer to the nearest hundredth.
A. 179.76 feet B. 279.76 feet C. 13,243.1 feet D. 148.56 feet
Solve the equation by completing the square.x2 + 4x + 1 = 0
A. {-2 ± 
}
B. {1}
C. {2 ± 
}
D. {
± 2}