?A system composed of two industries, coal and steel, has the inputs as seen below.
(a) To produce 1 dollar's worth of output, the coal industry requires $0.30 of its own product and $0.70 of steel. (b) To produce 1 dollar's worth of output, the steel industry requires $0.30 of its own product and $0.10 of coal. Find D, the input-output matrix for this system. Then solve for the output matrix X in the equation 
where the external demand is 
. Round all the entries of the matrix to two decimal places, where applicable.
A. ?
B. ?
C. ?
D. ?
E. ?
Answer: C
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A. log10 
B. log5 
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A. 
B. 
C. 
D. 
Use the information given about the angle ?, to find the exact value of the indicated trigonometric function.cot ? = 
, ? < ? < 
Find tan 2?.
A. 
B. 
C. - 
D. - 
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 figure 2.png)