I don't remember how to do this stuff

The graph below could be the graph of which exponential function?

Can (3,5 and square root 34) be sides on a right triangle?

Answer asap! show all work! find the number of complex roots, the possible number of real roots and the possible rational roots of the polynomial function. then, solve for all roots. x^3 + 2x^2 + 3x + 6 = 0