Is 400. greater less than or equal to 100 gallons

Twenty-five percent of the customers entering a grocery store between 5 p.m. and 7 p.m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

Find the zero function by factoring (try to show work) h(x)=-x^2-6x-9

What is the slope of (0,32) and (100,212)