(a(i))[1]
Show that there are 115 boys.
(a(ii))[2]
Find the ratio girls : boys in school on this day. Write your answer in simplest form.
(a(iii))[2]
Calculate the number of students next year.
(a(iv))[3]
Calculate the number of students when the school was opened.
(b)[3]
Calculate the population after 30 years. Give your answer correct to the nearest thousand.
(c)[3]
Find the value of r.