What is perimeter and what is the answer need

The depth of a lake at a certain point, wich is a function of the distance of that point from shore, is 30 feet.

Which of these people has balanced their checkbook correctly? oa. gary: the balance in his check register is $500 and the balance in his bank statement is $500. b. gail: the balance in her check register is $400 and the balance in her bank statement is $500. c. gavin: the balance in his check register is $500 and the balance in his bank statement is $510.

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9