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How do you calculate arc length and sector area and why is it calculated like this? You are given sector angle 40 degrees and radius 7cm and asked to give answers to 3sf.

A sector represents a fraction of a circle. The fraction depends on the angle of the sector, X, and the total angle in a circle which is 360, such that the fraction is x/360. In this case the fraction is 40/...
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Answered by Peter K. • Maths tutor
6802 Views

Why are certain verbs always followed by the dative case?

In a sentence, the object can be either direct or indirect. When the object is acted on directly, it takes the accusative case. Example : 'Sie isst den Apfel' (She is eating the apple). In other sentences, w...
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Answered by Oscar B. • German tutor
2102 Views

How successful were Stalin's economic policies?

From 1929 to 1941 Stalin deployed a number of economic policies to transform Russia from a backward nation into a European superpower. A motive that is clear from his own dialogue in the late 1920's, "w...
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Answered by William H. • History tutor
26981 Views

What's the difference between Passato Prossimo and Passato Remoto?

It's a very complex question, but the broad answer boils down to this: it's your attitude about the past. If you think that a past event is connected to the present, or in any way important for you right now...
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Answered by Anna W. • Italian tutor
2864 Views

What is the difference between a gene and a chromosome?

DNA is a long list of instructions which everyone has inside the nucleus of each of their cells. A section of DNA that has instructions to make a certain protein is called a gene . Now because DNA is so long...
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Answered by Saheefa I. • Biology tutor
3544 Views