Why are steam engines important today?

If you lived in greece in about 300b.c. you had a good chance of witnessing which of the following? select all that apply

How does a comet change when it comes close to the sun

Acertificate of deposit usually pays you more interest because you need a larger amount of money to open it and a the money in a cd is the banks money not yours. b the money in a cd cannot be withdrawn until a future date. c the money in a cd is considered a loan. d the money in a cd is digital money.