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Is there a theorist who discussed World English?

Whilst most students will refer to Kachru's 'Circles' model. Another useful theorist to remember is Schneider, who proposed the dynamic model. Schneider studied how English becomes established around the wor...
DC
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How do I find and determine the nature of stationary points of a function?

There are 3 types of stationary points for functions: a maxima, a minima and a saddle point. They all occur when the derivative of a function, f(x), is equal to 0, e.g. f'(x)=0. Therefore in order to find th...
BD
Answered by Ben D. • Maths tutor
12075 Views

Explain how the small intestine is adapted to its absorptive function (4)

The small intestine has many adaptions that help effective absorption to take place. Firstly it is very long, meaning there is a lot of time for nutrients to be absorbed. Secondly it has villi which are fing...
AU
Answered by Anastasia U. • Biology tutor
50033 Views

How does pH affect the rate of reaction on an enzyme?

Optimum pH for enzymes in the human body is 6. It's a bell shaped Graph. At Higher or lower pH, the alkalinity/acidity denatures the enzyme, which changes the shape of the active site, and so the substrate c...
MH
Answered by Max H. • Biology tutor
12004 Views

Use the Chain Rule to differentiate the following equation: y=e^(3-2x)

Chain Rule: dy/dx = dy/du x du/dxy=e 3-2x Substitute u for the power (3-2x) y = e u u = 3-2xdy/du = e u du/dx = -2dy/dx = -2e u = -2e 3-2x
JW
Answered by Jordan W. • Maths tutor
4181 Views