Can someone help me with my math please

Is this a polynomial function? i need to know asap

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

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=[? ]