**Helpful Links**Question**

21) The mass of an ornament is

The height of the ornament is

21 a) Work out an equation connecting m and h.

*m*grams.The height of the ornament is

*h*centimetres.*m*is directly proportional to the cube of*h*.*m*= 1600 when*h*= 821 a) Work out an equation connecting m and h.

**[3 marks]**

21 b) Work out the mass of an ornament of height 12 centimetres.

**[2 marks]**