Neko1kat

06.06.2020 • 

Engineering

Blacktop Refining extracts minerals from ore mined at two different sites in Montana. Each ton of ore type 1 contains 20% copper, 20% zinc, and 15% magnesium. Each ton of ore type 2 contains 30% copper, 25% zinc, and 10% magnesium. Ore type 1 costs $90 per ton while ore type 2 costs $120 per ton. Blacktop would like to buy enough ore to extract at least 8 tons of copper, 6 tons of zinc, and 5 tons of magnesium in the least costly manner. What is the objective function, in words?

Ответ:

gdestini165

18.10.2022

Engineering

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draw lines center to vertex

43.5 square inches

261 square inches

Step-by-step explanation:

Part A:

The area can be decomposed into triangles by drawing a line from the center to each vertex of the hexagon.

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Part B:

The area of each triangle is given by the triangle area formula:

 A = (1/2)bh

 A = (1/2)(10 in)(8.7 in) = 43.5 in²

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Part C:

The area of the table top is 6 times the area of one triangle:

 surface area = 6(43.5 in²) = 261 in²

Step-by-step explanation:

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