Solve the problem.A textbook economy has only two industries, the electric company and the gas company. Each dollar's worth of the electric company's output requires 0.20 of its own output and 0.4 of the gas company's output. Each dollar's worth of the gas company's output requires 0.50 of its own output and 0.7 of the electric company's output. What should the production of electricity and gas be (in dollars) if there is a $16 M demand for electricity and a $7 M demand for gas?
A. Electricity: $107.5 M; Gas: $100 M
B. Electricity: $125 M; Gas: $92.5 M
C. Electricity: $115 M; Gas: $103.5 M
D. Electricity: $97.5 M; Gas: $103 M
Answer: A
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Determine whether the number is prime, composite, or neither.100
A. neither B. prime C. composite
Solve the problem. Use 3.14 as an approximation for ? where appropriate.The foundation for a cylindrical flower bed is a cylinder 24 in. in diameter and 3 in. high. How many cubic in. of concrete are needed to build the foundation (to the nearest hundredth)?
A. 452.16 in.3 B. 2712.96 in.3 C. 5425.92 in.3 D. 1356.48 in.3
Use a calculator to compute. Round the result to two decimal places.
+ 
A. 1.43 B. 0.00 C. 1.37 D. 0.70
Use the simplex method to solve the linear programming problem.Maximizez = x1 + 3x2 + x3 + 2x4subject to:2x1 + x2 + 5x3 + 6x4 ? 25 5x1 + 3x2 + 4x3 + x4 ? 60withx1 ? 0, x2 ? 0, x3 ? 0, x4 ? 0
A. Maximum is 50 when x1 = 0, x2 = 0, x3 = 0, x4 = 25 B. Maximum is 60 when x1 = 0, x2 = 20, x3 = 0, x4 = 0 C. Maximum is 75 when x1 = 0, x2 = 25, x3 = 0, x4 = 0 D. Maximum is 36 when x1 = 0, x2 = 10, x3 = 0, x4 = 3