Please answer this correctly without making mistakes

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?

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