Assalam o aalaikum any Muslim here​

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.

30 ! the graph shows the number of siblings different students have. select from the drop-down menus to correctly complete the statement.