How many atoms are in cu3(co3) (oh)2

The speed of a falling object increases at a constant rate as time increases since the object was dropped. which graph could represent the relationship betweent time in seconds, and s, speed in meters per second? speed of a falling object object over time

What number should be added to both sides of the equation to complete this square? x^2-10x=7

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?