What are the zeros of this function?

Airline passengers arrive randomly and independently at the passenger-screening facility at a major international airport. the mean arrival rate is 10 passengers per minutes. compute the following probabilities. p(x = 4) p(x > 11)

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180

What statement is true? 2x^2-9x+2=-1