5pi/6 r^2 = 15pi
R^2 = 18
R= 3sqrt(3)
Because he has 4 pounds of apples left, you are to subtract that from the total pounds picked, which was a total of 55 pounds. So 55 with 4 taken away, or 55 - 4, equals 51. Since he had equally put 51 pounds into six bags, you are to then divide . 51 / 6 = 8.5. He had put 8.5 pounds worth of apples into each bag.
Y = -3x + 13
Steps and the graph are on paper