This is a photograph of the Roman Colosseum. Which building technique invented in Ancient Rome is seen in this photograph?
O arch
O dome
O pillar
O wheel

On a supply and demand graph, equilibrium is the point where the two curves meet. the supply curve begins. the supply curve ends. the demand curve ends.

If the age of the lowermost layer of a rock sample is more than 2 million years, which of the following could be the age of the upper layers? less than 1 million greater than 3.5 million between 2 million and 3 million between 3 million and 3.5 million

She sat with a smile on her face, as if to say how , how privileged, she felt to be there, how alert and ready to respond to the demands of this life she was, once she understood what they were.