Top answers

An open-topped fish tank is to be made for an aquarium. It will have a square base, rectangular sides, and a volume of 60 m3. The base materials cost £15 per m2 and the sides £8 per m2. What should the height be to minimise costs?

Establish the areas of each of the five faces of the aquarium in terms of x and y, and then sum to obtain a function of the cost in x and y. Then identify that the volume also gives a function in x and y. Re...
JP
Answered by Jonny P. • Maths tutor
8011 Views

Discuss J S Mill's notion that to deprive society of an opinion is to assume infallibility

Mill’s ideas about fallibility expound his notion that we can never be sure of what the truth is, because in order to be so we would have to accept the proposition that we are infallible, which is a false co...
JC
2805 Views

Trigonometry: what is it, and how do I do it?

Trigonometry is used in maths to find angles and the lengths of edges in triangles. There are three main operations: sin, cos and tan, and these are used to convert the information you have about a triangle,...
AR
Answered by Amy R. • Maths tutor
4745 Views

On the significance of the imagery of “words” to the play Othello

The idea of words and indeed how language can be manipulated to obscure and alter the truth is crucial to the play, in particular the character of Iago. The magic of the yarns Iago spins in order to create a...
JC
9022 Views

I have revised all the content for Economics but my essays are not reaching the top level, what can I do to ensure I get the highest marks?

The most important feature in an A level economics essay is evaluation. This is a common mistake amongst many A level students- an economics essay should not simply be a regurgitated knowledge but rather an ...
RT
Answered by Ria T. • Economics tutor
2464 Views