Ok last question of the day worth 93 POINTS ! what is 0+0 :)

Asoccer ball manufacturer wants to estimate the mean circumference of soccer balls within 0.1 in

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?

Tom wants to order tickets online so that he and three of his friends can go to a water park the cost of the tickets is 16.00 per person there is also a 2.50 one-time service fee for ordering tickets online write an expression in term of n that represents the cost for n ordering tickets online