B) Bilal sells books at a department store after school. His base salary each week is 500 Dirham, and he earns a 15% commission on each book that he sells. His total earnings f(x) for a week in which he
sold Dirhams worth of a book is f() = 500+ 0.35X,
a. Explain why the inverse function() exists. Then find (4)
b. What do f'(x) and represent in the inverse function?
e. What restrictions, if any, should be placed on the domains of f(x) and (x)? Explain
d. Find Bilal's total sales last week if his earnings for that week were more than 800 Dirhams (Apts)
(DOK2) HSFBF,3,4,8