Need help with these ASAP please

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?

Shannon drove for 540 minutes. if she traveled 65 miles per hour, how many total miles did she travel?

Use the squared identities to simplify sin^2x cos^2x