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White paint costs £2.80 per litre. Blue paint costs £3.50 per litre. White paint and blue paint are mixed in the ratio 3 : 2 Work out the cost of 18 litres of the mixture.

Understanding of the ratio: 2+3=5, 3/5 is white, 2/5 blue, 2.8 18 (3/5) + 3.5 18 (2/5) No calculator paper, so check ability to do accurately arithmetic as above and make sure to think about the answer as co...
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Answered by Rhys T. • Maths tutor
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Cycloheximide inhibits translation. Describe the process of translation.

Translation is a process of protein creation from an RNA strand. This occurs the ribosome, a small organelle that can either be free in the cytoplasm or on the rough endoplasmic reticulum. Messenger RNA trav...
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Answered by Rhys T. • Biology tutor
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How should I achieve my purpose of persuading my audience during the creative writing section of the exam?

Purpose is the reason you are writing the text. In this case it is to persuade your audience into thinking in a certain way. It is important to read carefully in the question as to who your audience is as th...
EC
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A rectangular path has perimeter of 240m. If the rectangle is split lengthways, two paths of 160m are formed. Work out the lengths of the sides of the original path.

Firstly, make sure to draw a picture! Worded questions are used to catch people out. Drawing a diagram makes solving certain problems much easier. Secondly, notice that we are asked for two pieces of informa...
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Answered by Henry D. • Maths tutor
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State what is meant by the term 'first ionisation energy' and explain why the first ionisation energy of barium is lower than that of calcium

First ionisation energy is the energy required to remove one mole of electrons from one mole of gaseous atoms, to produce one mole of gaseous ions each with a (+1) charge. Barium has more energy levels than ...
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Answered by Varsha S. • Chemistry tutor
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