Plot the given complex number on a graph and determine its absolute value.

z = 9i

Plot the given complex number on a graph. Express the complex number in the polar form.

-2i

Plot the given complex number on a graph. Express the complex number in the polar form.

-12 + 5i

Express the given complex number in rectangular form. Write your answer in one decimal place, if necessary.

35(cos 250° + i sin 250°)