All of the following show density and buoyancy except
a. a boulder resting at the bottom of the ocean.

b. the ammount of hot soup contained in a bowl.

c. ice cubes floating in a glass of iced tea.

d. a hot air balloon moving through the air.

I think the correct answer from the choices listed above is option B. The amount of hot soup contained in a bowl does not show density and buoyancy. The other choices shows these things since it shows the that due to differences of such values for each object, one object floats or sinks.

The correct answer is A) The average number of sharks was 7,550.

Explanation:

The average number do not play any role in calculating the range of particular data. The range of particular data can be calculated when we have the lowest number of that data and the highest number of the data.

Then to find out the range lowest number is subtracted with the highest number of the data. Here the range is calculated to be 5,000 so the highest population can be 10,000 and lowest population can be 5,000. Therefore after subtracting 5,000 with 10,000 we get a range of 5,000.

So, the correct answer is A) The average number of sharks was 7,550.