Please help! Ignore what i clicked, i accidentally hit it. Thank you

If an athlete can bike 6 miles in 25 minutes, how many miles will he bike in an hour and half if he continues to bike at the same rate?

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?

Which is a reasonable estimate of the amount of water in a small, inflatable pool used by children?