Use the pictograph to answer the question.This pictograph shows projected sales of compact disks (CDs) for a popular rock band for seven consecutive years. 
? = 1000 CDsWhat is the total projected sale of CDs for the two years in which the sales are expected to be the least?
A. 2000
B. 5000
C. 4000
D. 3000
Answer: B
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Find an equation for the line with the given properties.Parallel to the line 3x + 7y = 53; containing the point (6, 11)
A. 3x - 7y = 95 B. 7x + 3y = 11 C. 3x + 7y = 95 D. 6x + 7y = 53
Write decimal notation.
A. 0.00074 B. 0.074 C. 0.000074 D. 0.0074
Find the area of the square.
A. 392 sq cm B. 196 sq cm C. 56 sq cm D. 191 sq cm
The energy economy of an area is composed of four industries: gas, coal, hydroelectric and nuclear. The three main consumers of energy are area residential consumers, a manufacturing plant, and a university. Assume that each consumer may use some of the energy produced by each industry, and also that each industry uses some of the energy produced by each of the other industries. The energy needs of each consumer and industry are represented by a demand vector whose entries, in order, give the amount of gas, coal, hydroelectric, and nuclear energy needed by each consumer or industry, in some convenient units. The demand vectors for the consumers are: src="https://sciemce.com/media/4/ppg__tttt0616191201__f1q184g2.jpg" alt="" style="vertical-align: -8.0px;" /> 
and the demand vectors for the industries are: 
What is the total demand for the four types of energy from only the energy industries?
What will be an ideal response?