A computer store buys a computer system at a cost of $640.50. The selling price was set at $854, but after a year the computer did not sell. The store then advertises a 25% markdown on the $854 computer system. Find the sale price.

What is the total surface area of this square pyramid?

Can someone me with these two circle theorem questions asap?

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.