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The volume of a cone is V = 1/3*pi*r^2*h. Make r the subject of the formula.

Answering the question by acknowledging the student understands what the question is actually asking. The subject of the formula sits by itself on one side of the equation and doesn't appear at all on the ot...
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Answered by Alice-Kate R. • Maths tutor
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How should I revise for my A-level exams? What is the best preparation?

This is different for everyone, and the best way to learn the most effective way for revision is to implement this throughout the school year. Keep up to date with your notes and practice different types of ...
Answered by • History tutor
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Given y=rootx + 4/rootx = 4, find the value of dy/dx when x=8, writing your answer in the form aroot2, where a is a rational number.

First, we will write out the equation, writing the root x values in a way that allows us to differentiate them. Root x can be written as x^1/2 and 4/rootx can be written as 4x^-1/2. Now we can differentiate....
Answered by • Maths tutor
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What is the gerundival attraction?

Although the name sounds scary, it is easier that it seems. In Latin when a gerund has an object, there is a tendency to harmonise the terminations of the two, so the object will agree with the sense of the ...
Answered by • Latin tutor
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Describe the structure and function of the heart valves

There are four heart valves in total. The triscuspid valve is between the right atrium and ventricle. The bicuspid valve is between the left atrium and ventricle. These are the atrioventricular valves and st...
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Answered by Rajan M. • Biology tutor
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