Using the pythagorean theorem find the missing length if a=10, c=15, b=?

What does the point on the graph represent? a. aggregate supply and demand equilibrium b. aggregate supply c. aggregate rising prices and supply d. aggregate rise in gdp

I'm in a few lessons on eastern europe and i need me don't leave me hanging. : {

Identify a true statement about media multiplexity.the choice of medium is primarily important in determining the strength of relationships.weak ties are uncomplicated and do not need many channels to sustain them.tie strength plays an insignificant role in determining the number of media employed by pairs.strong ties require less media than weak ties to orchestrate their varied and interdependent connection.