Simplify (\(\frac{3}{4} + \frac{1}{3}) \times 4\frac{1}{3} \div 3\frac{1}{4}\)

If x varies over the set of real numbers, which of the following is illustrated in the diagram above?

A bricklayer measured the length of a wall and obtained 4.10m. If the actual length of the wall is 4.25m, find his percentage error.

The nth term of a sequence is given by 3.2\(^{n-2}\). Write down the first three terms of the sequence.