(a)[2]
Her accommodation spending in 2019 was $7200$. Calculate the percentage of her income that she spent on accommodation.
(b)[2]
Her yearly income of $22000$ went up by $4\%$ in 2020. Calculate her annual income in 2020.
(c(i))[2]
Nicole places $2000$ in an account. The account earns compound interest at a rate of $K\%$ per year. By the end of the first year, the balance is $2036$. Show that $K = 1.8$.
(c(ii))[3]
Calculate how many complete years must pass before Nicole has at least $2150 in the account. Show your working.