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Anna11 [10]
3 years ago
7

Help with my work and step by step please

Mathematics
1 answer:
Dmitrij [34]3 years ago
7 0

Answer:

600cm^2

Step-by-step explanation:

20*20=400

20/2=10= h in 1/2bh

(1/2)10*20=100

square=400

triangle=100

total area=square+triangle+triangle

600cm^2

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Answer:

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Please consider the complete question.

An automobile firm wants to purchase either machine A or machine B. The intial cost of machines A and B are $40,000 and $50,000, respectively. The power consumption per year of machines A and B are 120 MWh and 100 MWh, respectively. The power cost is $40/MWh. The estimated operating and maintenance cost over 10 years is $30,000 for machine A and $20,000 for machine B.

First of all, we will find the amount spent on power consumption for 10 years by each machine as:

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