Final answer:
After fulfilling a special order for 18 bracelets which takes 27 hours, Kerri has 93 hours left for the month. Since it takes 3 hours to make each necklace, she can make 31 necklaces with her remaining time.
Step-by-step explanation:
Kerri starts by filling a special order for 18 bracelets, and each bracelet takes 1.5 hours to make. The total time spent on bracelets is calculated by multiplying the number of bracelets by the time it takes to make each one:
18 bracelets × 1.5 hours/bracelet = 27 hours
Since Kerri plans to spend 120 hours making jewelry, we must subtract the time spent on bracelets from the total available time to find out how many hours she has left for making necklaces:
120 hours - 27 hours = 93 hours left for necklaces
As it takes 3 hours to make each necklace, we calculate the number of necklaces Kerri can make with the remaining time:
93 hours ÷ 3 hours/necklace = 31 necklaces
Therefore, Kerri can make 31 necklaces during the month after completing the special order for bracelets.