You for me. i had a lot of homework and me a lot

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Arestaurant charges $100 to rent its banquet room for an event. it also charges $15 to serve dinner to each guest. write an equation for the total cost of the banquet room in terms of the number of guests. deine your variables. what is the total cost of the banquet room for 20 guests?