(a(i))[3]
Find the floor area.
(a(ii))[2]
Calculate the cost of constructing the house. Give your answer correct to $3$ significant figures.
(b)[2]
Use trigonometry to calculate the value of $x$.
(c)[3]
Calculate the total amount Jared receives at the end of the three years.
(d)[3]
Calculate the percentage profit that he makes.