Hello, looking for help with the following two questions.
1) A bookshop is reducing the price of certain books by 12%.
(i)Work out a formula linking the sale price of a book to its original price.
(ii)If the sale price of a particular book is $66, what was its original price?
2) Use the index laws to simplify the following.
(i) a(9a^2 b)^2 / 3a^4 b^ 3
(i) 4x^-2/y^-3 / xy^2 / 3x^-2
Looking forward to collaborating to solve these issues.