What is the greatest whole number that rounds to 2000 when rounded to the nearest hundred

Np4=12np2 with clear explanation.

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.

Find the domain of the following expression: 1/(√x)-2