Please help! Don’t know if I’m right!!

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

Which compound contains both ionic and covalent bonds? a) hbr b)cbr4 c)nabr d) naoh

How do i complete this electrolysis of water lab? i’m at home, so i don’t have the materials, and the lab didn’t properly work and was incomplete at school.