Final answer:
Kerion can make 1 necklace every 10 minutes. To make ten necklaces, it would take her 100 minutes, which is equivalent to 1 hour and 40 minutes.
Step-by-step explanation:
To determine how long it will take Kerion to make ten necklaces, we first calculate her rate of production. We know that she can make 12 necklaces in 2 hours. This means she makes 1 necklace every 10 minutes (2 hours = 120 minutes, 120 minutes ÷ 12 necklaces = 10 minutes per necklace).
Therefore, to make ten necklaces, we multiply the time it takes to make one necklace by ten:
10 minutes/neclace × 10 necklaces = 100 minutes
When converted into hours, 100 minutes is equal to 1 hour and 40 minutes. So, it will take Kerion 1 hour and 40 minutes to make ten necklaces.