What are the domain and range of the function f(x)= 1/4(x3+ 6x2 + 5x-4)?

Find the area of the regular hexagon if a side is 20 cm.

The distance of a chord from the centre of a circle is 12cm and the lenght of the chord is 10cm. find the radius of the circle

Atorch and a battery cost 2.50 altogether.the torch costs 1.50 more than the battery.what fraction of the total price is the torch? give your answer in its simplest form.