The relationship governing the intraindustrial and interindustrial sales and purchases of four basic industries - agriculture (A), manufacturing (M), transportation (T), and energy (E) - of a certain economy is given by the following input-output matrix.
How many units of energy are required to produce 5 units of all goods in the economy?
a. 2.3 units
b. 2.5 units
c. 2.9 units
d. 3.2 units
b. 2.5 units
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A. 690 B. 790 C. 780 D. 7900
Convert the given polar coordinates of the point to rectangular coordinates.(4, 225°)
A. (-2
, -2
)
B. (2
, 2)
C. (-2
, -2)
D. (2, 2
)
Solve the three-part linear inequality. Graph the solution set on a number line, and express the solution using interval notation.-4 < x - 1 ? 7
A. [-3, 8)
B. (-3, 8]
C. (-5, 6]
D. [-5, 6)
Find a matrix A and a column matrix B that describe the following tables involving credits and tuition costs. Find the matrix product AB, and interpret the significance of the entries of this product.
?
A.
AB = 
Tuition for Student 1 is $940, tuition for Student 2 is $810, and tuition for Student 3 is $650.
B.
AB = 
The number of credits for Student 1 is 12, the number of credits for Student 2 is 15, and the number of credits for Student 3 is 12.
C.
AB =
Tuition for Student 1 is $840, tuition for Student 2 is $660, and tuition for Student 3 is $900.
D.
AB = 
The number of credits for Student 1 is 12, the number of credits for Student 2 is 17, and the number of credits for Student 3 is 15.