I need help getting the answer

Step-by-step explanation:

The center is at (2,-7). The radius is 2.

(x-2)² + (y+7)² = 2²

There are 24 hours in a day. For 7 days there will be 168 hours in total. Divide this number of hours by 6 to determine the number of times that the patient would have to take tablets. 
                                     (168 / 6) = 28 times
Each time, the patient is to take 2 tablets. Therefore, the number of tables for this prescription is 56.