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First, convert the units so you can compare more easily. 

0.72m = 72cm = 720mm

So 1 shelf is 720mm and 1 textbook is 30mm wide. 

To find the maximum number of books that can be stored...

Degrees are a made up unit; mathematicians simply decided that a complete revolution of a circle has 360 degrees, without that number actually meaning anything. Tecnically any number could have been picke...

A Sankey Diagram can be used to represent the energy usage and efficiency of anything. There are 3 main parts of  Sankey diagram, the start (left side), the arrow heads that peel off facing upwards or dow...

Assess utilitarianism for a board can be a very open question. You aren't subject to specific forms of the theory, though it can be helpful to assess at least two. Recognising a problem for one i...

Extracellular digestion is a process in which an organism feeds by secreting enzymes through its cell membrane and on to the food. These enzymes then catalyse the breakdown and the digestion of the food. ...