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What is meant by the 'circulation systems' in terms of blood flow?

There are two circulatory systems in the body that enable blood to flow around the body. One system is between the heart and the lungs, and the other is from the heart to every other part of the body. The he...
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Explain 4 key sources of monopoly power.

Legal barriers. Some monopolys are granted their status as monopolys by government for a fixed period. For example, Camelot who operate the National lottery are granted the power to be the sole supplier unti...
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Answered by Cameron L. • Economics tutor
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Find the volume and surface area of a cylinder, of length 20cm and radius 5cm.

A diagram is often helpful to draw for questions like this. 1.) Volume. For the volume of a cylinder, you must first find the area of the face, and multiply by the length. The formula for this is Vol= πr^2 ....
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Answered by Cameron L. • Maths tutor
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Find dy/dx of the equation y=x^2 ln⁡(2x^2+1).

This question requires the use of two key rules of differentiating. The first of these is the product rule. The product rule describes a way of differentiating an equation which is the product of two differe...
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Answered by Cameron L. • Maths tutor
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How can you calculate the distance between 2 points in a grid if they're not on the same horizontal or vertical line?

Recall Pythagoras' theorem. a^2 + b^2 = c^2. Think about this as a triangle, with a and b being the lengths of the 2 perpendicular sides, and c being the length of the hypotenuse. [Drawing on a whiteboard wo...
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Answered by Tom C. • Maths tutor
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