Really, everytime I actually need help with a question,

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?

If a baby uses 15 diapers in 2 days how many diapers will the baby use in a year

Through non-collinear points there is exactly one plane.