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Explain why the USA did not enter the Second World War until December 1941.

When addressing questions like this, it's very important not to simply describe why the USA did not enter the Second World War until 1941. Normally, to unpack questions like this, its important to think of t...
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Answered by Isabel P. History tutor
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How to determine the rank of a matrix?

first the definition of the rank of a matrix is "maximal number of linearly independent column vectors in the matrix" then the question could be rephrased to " how many independent column vect...
YS
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Showing all your working, evaluate ∫(21x^6 - e^2x- (1/x) +6)dx

∫(21x 6 -e 2x -1/x+6)dx To tackle this question, I would do each part separately. Firstly, take 21x 6 ...using the product rule this intergrates like so (21/(6+1))x 6+1 = (21/7)x 7 = 3x 7 Second, e kx always...
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Answered by David G. Maths tutor
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Why are no supernormal profits made in perfect competition in the long run?

A perfectly competitive market is a market in which there are many buyers and many sellers who all have perfect information. There are many firms in the market who all produce exactly the same product and th...
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Answered by David G. Economics tutor
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What is meant by the term Shadow Cabinet (5 marks)

The Shadow Cabinet are members of the opposition (currently the Labour party who won the second largest proportion of seats) that sit on the front bench in The House of Commons and are seen as the alternativ...
ZS
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