What is the lowest value on a quadratic graph called

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11

Ahome improvement store rents it’s delivery truck for $19 for the first 75 minutes and $4.75 for each additional 1/4 hour. if a customer rented the truck at 11: 10 am and returned the truck at 1: 40 pm the same day, what would his rental cost be?

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take