(4y¹²) (3y)
Please help me​

And employee salary increased by $4500 which represents a 15% raise what is the rate of the increase

Plz heeeeeeelp plz give me the answer

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?