3. Given the price-demand equation p + 0.005x = 30

a) Express the demand x as a function of the price p. (1 mark)

b) Find the elasticity of demand, E(p). (7 marks)

c) What is the elasticity of demand when p = $10? If this price is increased by 10%, what is the approximate percentage change in demand? (4 marks)

d) What is the elasticity of demand when p = $25? If this price is increased by 10%, what is the approximate percentage change in demand? (4 marks)

e) What is the elasticity of demand when p = $15? If this price is increased by 10%, what is the approximate percentage change in demand? (4 marks