a.
17 minutes is equivalent to 17*60 = 1020 seconds
22 minutes is equivalent to 22*60 = 1320 seconds
d: distance of the flowerbed from the hive. (in feet)
speed = distance/time
then, time = distance/speed
The bee spends some time travelling to the flowerbed, then staying at the flowerbed and finally travelling back to the hive. This can be expressed as follows:
d/12 + 1020 + d/8 = 1320
b. Solving for d:
2d/24 + 3d/24 = 1320 - 1020
5d/24 = 300
d = 300*24/5
d = 1440 ft