Final answer:
To find out how many boxes were used, divide the total number of water bottles by the number of bottles in each box. In this case, there are 188 water bottles and each box contains 7 water bottles. Penny used 27 boxes to ship the water bottles.
Step-by-step explanation:
To find out how many boxes were used, we need to divide the total number of water bottles by the number of water bottles in each box. In this case, there are 188 water bottles and each box contains 7 water bottles. So, the number of boxes used can be found by dividing 188 by 7.
188 ÷ 7 = 26.8571428571
Since we cannot have a fraction of a box, we round up the result to the nearest whole number. So, Penny used 27 boxes to ship the water bottles.