How are these triangles similar

Which expression gives the area of the triangle shown below

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

Will give let f(x)=2x and g(x)=[tex]2^{x}[/tex] graph the functions on the same coordinate plane. what are the solutions to the equation f(x)=g(x) ? enter your answers in the boxes x=[? ] or x=[? ]