A Machine Shop Produces Metal Brackets on Two Different Machines

question 71

Multiple Choice

A machine shop produces metal brackets on two different machines. Machine 1 can produce a bracket every 10 minutes. Machine 2 can produce a bracket every 4 minutes. What is the average productivity per machine?

• A) 4.3 brackets/hour
• B) 8.6 brackets/hour
• C) 10.5 brackets/hour
• D) 21.0 brackets/hour
• E) 7.0 brackets/hour

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Definitions:

Fossils

Preserved remains, impressions, or traces of once-living organisms from the distant past.

Cyanobacteria

Photosynthetic microorganisms found in water, sometimes referred to as "blue-green algae," important for their role in nitrogen fixation and oxygen production.

Oxygen-rich Atmosphere

An atmosphere that contains high levels of oxygen, typically associated with the development and sustenance of complex life forms on Earth.

Carbon Dioxide-rich Atmosphere

An atmosphere that contains a high concentration of carbon dioxide, affecting climate and living organisms.