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How should I know when to use "tu" or "usted"

Usted is a more formal and respectful term to use when talking to a new acquaintance, an older person or someone who you wish to show respect to due to their higher rank e.g an authority figure. It's plur...

Answered by Lauren F. • Spanish tutor

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Cellular structure of the brain

The cellular structure of the brain is a relatively recent discovery and it's Santiago Ramòn y Cajal that recognised it; in addition to this he recognised the neuron as the basic unit. Three main elements...

Answered by Sara D. • Biology tutor

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Given y = 2x(x^2 – 1)^5, show that dy/dx = g(x)(x^2 – 1)^4 where g(x) is a function to be determined.

y=2x(x²-1)⁵dy/dx= 2(x²-1)⁵ + 2x*10x(x²-1)⁴dy/dx=(x²-1)⁴(2x²-2+20x²)dy/dx=(x²-1)

Answered by Katie S. • Maths tutor

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What is the core periphery model?

The core-periphery model is one used to describe the globalised world. A country with many international political, economic and social interactions is considered core. E.g UK. Whilst a country with limit...

Answered by Sebastian W. • Geography tutor

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