I need help solving this problem y and x and also to be explained

What is most likely to cause someone to fall overboard?

Using complete sentences, describe the central economic problem facing all humans. why does this require people to make choices? how can this result in opportunity costs?

The specific heat of the three substances in the image are given in the table. stamped concrete: 0.75, grass covered soil: 1.01, water: 4.18. place the areas in order based on how fast they’ll heat up on a sunny afternoon. start with the fastest and end with the slowest.