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Explain how the mitochondria plays an important role in sustaining life?

The mitochondria is an organelle important for aerobic respiration. This is a process which uses glucose and oxygen to produce adenosine triphosphate, carbon dioxide and water. ATP is a molecule needed to pr...
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Answered by Felyx W. • Biology tutor
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integrate arcsin(x)

Use integration by parts to obtain:u=arcsin(x), u'=1/(1-x 2 ) 0.5 , and v'=1, v=x Using the equation: integral of uv' = uv - integral of u'vintegral of arcsin(x) = xarcsin(x) - integral of x/(1-x 2 ) 0.5 Use...
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Answered by Maya G. • Maths tutor
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The perimeter of a right-angled triangle is 72 cm. The lengths of its sides are in the ratio 3 : 4 : 5 Work out the area of the triangle.

72 / (3+4+5) = 6base :3 6 = 18height :4 6 = 24area = (base * height) /2area = (18*24)/2=216 cm ^2
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Answered by Ibrahim H. • Maths tutor
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Explain how the properties of water, that are essential to living things, arise from the 
dipolar nature of water

a oxygen in water ‹ slightly › negatively charged and hydrogens ‹ slightly › positive b hydrogen bonding due to the dipolar nature c water molecules are cohesive due to hydrogen bonding d cohesion useful in ...
Answered by • Biology tutor
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How should I analyse a primary source?

When approaching primary source questions it is worth remembering that the examiner needs to see you weigh up the source’s evidence in the light of your own knowledge. This is easy to do if you apply the ‘ C...
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Answered by Anne H. • History tutor
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