I must type a short response. Can anyone help me out?

The graph above shows how the price of cell phones varies with the demand quantity. the equilibrium price for cell phones is where both supply and demand quantities equal $100, 5,000 5,000, $100

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

If 1.8 l of water is added to 2.5l of a 7.0 molarity koh solution, what is the molarity of the new solution