I need help please help me out

Acompany is testing in comparing to lightbulb designs the box plot shows the number of hours that each lightbulb design last before burning out which statement is best supported by the information of the plot

If x=-3 is the only x-intercept of the graph of a quadratic equation, which statement best discribes the discriminant of the equation?

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.