GIVING BRAINLIEST What is an atom's mass number?

○ Number of neutrons
○ Number of electrons
○ Number of protons
○ Number of protons plus number of neutrons

What produces wave a)sound b) heats c)transfer of energy d)vibrations

Suppose that a certain fortunate person has a net worth of $71.0 billion ($7.10×1010). if her stock has a good year and gains $3.20 billion (3.20×109) in value, what is her new net worth?

The same side of the moon always faces earth because the