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The sixth term of an arithmetic sequence is 8 and the sum of the first 15 terms is 60. Find the common difference and list the first three terms.

Formulae to be used: n^thterm of an arithmetic sequence u_n= u₁ + (n-1)d and sum of the first n terms of an arithmetic series S_n = (n/2) * (2u₁ + (n-1...

Answered by Bence C. • Maths tutor

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When will a perfectly competitive firm shut down?

To answer to this question, it is crucial that the students understand the difference between variable and fixed costs.Variable costs relate directly to the level of production and are dependent on it. Wh...

Answered by Ilias D. • Economics tutor

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Using a price ceiling diagram, analyse the impact a maximum price might have on the market for food.

A maximum price is a price set below the market equilibrium by the government which firms are not allowed to exceed. This can result in creating disequilibrium in the market resulting in ...

Answered by Izma M. • Economics tutor

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What are some of the socio-economic causes of high population growth in sub-Saharan Africa?

Due to relative poverty in large parts of sub-Saharan Africa (especially in rural areas) a lot of people can't afford contraceptives even when they are available, furthermore, high rates of subsistence fa...

Answered by Thibaud V. • Geography tutor

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Discuss the possible consequences of the imposition of an indirect tax on cigarettes for the different stakeholders in the market.

An indirect tax (when a government places a tax on goods or services) on cigarettes is an example of the correction of a negative externality of consumption (a market fai...

Answered by Rhea D. • Economics tutor

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