I need help finding the answer. Would appreciate some help

What is the base of 1/9 to the power of 2

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi