What is the initial value of the exponential function represented by the table?

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?

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?