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How to perform integration by substitution. (e.g. Find the integral of (2x)/((4+(3(x^2)))^2)) (10 marks)

We begin by looking at the integral by itself. The first thing we must do is evaluate what type of integration we should perform. It's always important to make sure that it's not a standard integral such as ...
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Answered by Kenneth B. Maths tutor
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Describe how information passes across a synapse

A chemical neurotransmitter is released from the end of one neurotransmitter, and diffuses across the synapse to bind to transmitters on the next neurone to stimulate an electrical impulse.
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Answered by Annabelle K. Biology tutor
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Calculate the mean and standard deviation from the following data

Time (Minutes) to complete an exam: 40, 38, 67, 84, 92, 43, 58, 57, 48, 50, 50, 74, 86 Mean: (add up the scores = 787; then divide by the number of participants = 13) 60.54 (to 2 decimal places) Standard dev...
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What is DNA?

DNA carries the genetic information that codes for instructions in our body and other organisms. DNA is deoxyribonucleic acid. It is found in the shape of a double helix. The conclusion that DNA is in the sh...
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Answered by Vicky B. Biology tutor
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Explain how physical and human factors contribute to an increased risk of water insecurity.

water insecurity is the result of not having accessible and reliable water stores Human:over abstraction- Israel pollution- chinadams.. less water down stream e.g. Mexico salinisation: over pumping in israel...
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Answered by Darcy S. Geography tutor
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