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Find the stationary points of the function y = (1/3)x^3 + (1/2)x^2 - 6x + 15

A stationary point is a point on the function where the gradient is zero. The phrase 'stationary point' coming up in a question always indicates that differentiation may be useful to solve it. In this case, ...
MH
Answered by Matthew H. • Maths tutor
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Describe and explain some of the direct and indirect effects of carbon dioxide on organisms?

Carbon dioxide only comprises 0.04 % of the earth’s atmosphere but it is a vital molecule in many processes and effects organisms directly with photosynthesis in plants, body functions causing global warming...
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Answered by Katie D. • Biology tutor
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Explain these 3 terms in relation to cells and osmosis: isotonic, hypertonic and hypotonic?

These 3 terms all describe the 3 possible concentrations of a solution in respect to the water potential surrounding a cell. Isotonic solution (Iso=same and tonic=strength) is where the extracellular fluid h...
KD
Answered by Katie D. • Biology tutor
46580 Views

3x+5y=7 and 9x+11y=13. Solve to find the values of x and y that satisfy both equations.

As there are two unknowns we have to eliminate either the x or the y in order to be able to solve. You can see that in the first equation the x value is a multiple of the x value in the second equation. Ther...
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Answered by Georgina S. • Maths tutor
4552 Views

How should I pick a college to apply to?

Picking a college is arguably a very important part of your application to Oxbridge as it is where you will be spending the majority of your time at. My advice would be to first check which colleges offer yo...
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