Answer:
A. Bar graph
Explanation:
Bar graphs are used to compare things between different groups or to track changes over time.
They both are increasing when moving down to the group......
Answer:
Conversion of energy
Explanation:
Shaking the sand is a form of kinetic energy. The friction of the sand particles rubbing against each other converts the kinetic energy to heat energy. Some of the kinetic energy also converts into the energy of sound waves, which you can hear while you shake the sand.
I would say that descriptive investigations aren't repeatable because it means that you are only describing something - you ask certain question about something, but do not form a hypothesis at that point yet. So it would be a waste of time to simply ask the same questions over and over again with no hypothesis to prove, which is why these types of investigations cannot be repeated.
25,000 buts you in the 30% bracet, so your answer would be, 30% or $7,500
