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AD=C+I+G+(X-M) Interest rates (i) determine the return of saving money in a bank and the cost of borrowing money from a bank. Therefore, a fall in i means that the cost of borrowing falls and the return o...

The equilibrium price and quantity within a market for a good can be found at the intersection of the supply and demand curves. Therefore, we need to use a mathematical method to find the P and Q by equat...

iPhones and Samsung phones can be considered close substitutes, i.e. if the price of one increases, consumers may wish to switch to the cheaper alternative. This means the demand for the substitute will r...

The reactivity of group 1 metals increases as we go down the periodic table because as we go down the group the electrons are further away from the nulceus as the number of shells increase and therefore t...

As with writing a letter in English, it is important to adopt the correct register and tone for the person you are writing to.

To open your letter, use one of the following options, picking the bes...