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In a sale, a bag goes on sale and the price is reduced by 20%. The sale price is £29.40. What is the original price of the bag.

The price of the bag has been reduced by 20% therefore the sale price of the bag is 80% of the full price. If we divide the sale price by 80 to get 1% of the price, we get £29.40/80 = £0.3675. We then mutlip...
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Answered by Aleyna M. • Maths tutor
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How can I remember all of the ethical guidelines involved in psychological research?

There's a mnemonic I used to use which I found really helpful to remember the ethical guidelines; When Doing Psychology Do Do It Correctly (W.D.P.D.D.I.C). Each one of these letter then refers to an ethical ...
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I'm confused about the difference between active and passive immunity

Active immunity occurs when an individual develops immunity against a specific antigen when they are exposed to it - your body reacts by producing memory cells that provide long lasting immunity against that...
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Answered by Sophie P. • Biology tutor
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What's the difference between an antigen and an antibody?

An antigen is a substance that is introduced to the body and stimulates an immune response and the production of antibodies. Antibodies are proteins produced by cells in the body in in repsonse to the presen...
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Answered by Sophie P. • Biology tutor
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Explain the concept of price elasticity of demand.

Price elasticity of demand or PED is a very useful concept in microeconomics. In order to understand this, lets quickly talk about what demand is. Demand in economics refers to the willingness and ability of...
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Answered by Abheek D. • Economics tutor
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