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What is Price Elasticity of Demand?

Firstly let's define Price Elasticity of Demand (PED): PED is the responsiveness of demand to a change in price. In the real world, Uber is a great example, on a Saturday night demand for Uber often spikes m...
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Answered by Kyren R. • Economics tutor
5816 Views

Translate the following sentences into French: 1) Although the environment is a big issue, most people are not concerned. 2) As our natural resources are so limited, we should not waste them. 3) I fear that they will never find a cure for AIDS.

Bien que l'environnement soit un grand problème, la plupart des gens ne se sentent pas concernés. 2) Puisque nos ressources sont tellement limitées, nous ne devrions pas les gaspiller. 3) J'ai peur qu'on ne ...
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Answered by Ben P. • French tutor
2722 Views

How do I know when to use 'ser' and when to use 'estar' if they both mean 'to be' in English?

This is a really common struggle for people learning and studying Spanish, even at university level. It's understandable because when we want to translate 'to be', for example; I am Naomi, I am friendly, I a...
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Answered by Naomi D. • Spanish tutor
3596 Views

How does the wave of conduction pass through the heart?

Firstly, the 'wave of excitation' is produced by the sinoatrial node (SAN) in the top of the right atrium - this is also known as the pacemaker, as this is what controls the rate of contractions. This wave p...
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Answered by Elisabeth B. • Biology tutor
10706 Views

What is the turning point on the curve f(x) = 2x^2 - 2x + 4

df/dx = 4x - 2 turning point when differential = 0 ==> 4x = 2 hence; x = 0.5 When x = 0.5 f(x) is equal to (substitute) 3.5 hence the turning point is at (0.5,3.5)
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Answered by David T. • Maths tutor
6290 Views