When did our solar system begin to form? when did our solar system begin to form? 5 million years ago 5000 years ago 5 trillion years ago 5 billion years ago

The fact that your teacher is making you memorize this is beyond ridiculous, but it was about 5 billion years ago.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2