Suppose that a sales person has to visit eight different cities including London. They must begin their trip in London, but can visit the other seven cities in any order they wish. How many possible orders can the sales person use when visiting these cities?

The possible orders can the sales person use when visiting the cities are:

Explanation:

The number of orders in which sellers can visit seven cities can be calculated by identifying the number of possibilities, therefore it can be said:

There are 7 cities to visit in the beginning, therefore that is the number of possibilities to visit in the first place (after London of course), however, for the second city to visit there are no longer the seven initial options but reduce by one, and so on by continuing to select cities until at the end there is only one option to choose, therefore the number of possible orders would be calculated:

This result can also be calculated using the factorial (!) Which is the number of ways in which a certain number of objects can be organized, which would have:

among other factors, composers started writing dynamic markings in their scores because "new instruments allowed for more dynamic ranges and contrast."

dynamics allude to the loudness or softness of music. dynamics offer an approach to demonstrate articulation in sheet music. they to drive the enthusiastic substance of music through volume and force. maybe you could alter both the volume and the shading profundity on your screen at the same time. we can likewise think about the force side of elements as the quality of a note. a few notes are intended to be played delicately and gently, while others are intended to be played all the more firmly.  

some dynamics markings have a letter 'm,' which remains for mezzo, signifying 'medium.' so a mezzo piano unique stamping resembles this (mp) and intends to play medium calm, while a mezzo specialty dynamic resembles this (mf) and intends to play medium loud.