A classroom has 10 rows and 12 columns of chairs. on a rainy day only 35 were occupied. how many chairs were empty

Coquina, a type of limestone, forms from shell fragments that settle on the ocean floor. what type of rock is coquina?

What is the difference between how ionic and covalent bonds form

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content