Final answer:
Lilly can make 6 necklaces in one hour, so in 5 hours, she can make 6 necklaces/hour multiplied by 5 hours, which equals 30 necklaces.
Step-by-step explanation:
The number of necklaces Lilly can make is proportional to the amount of time she spends making them. Since we know that Lilly can make 6 necklaces in one hour, we can find out how many necklaces she can make in 5 hours by simply multiplying the number of necklaces she can make in one hour by 5.
6 necklaces/hour × 5 hours = 30 necklaces
Therefore, Lilly can make 30 necklaces in 5 hours. The correct answer is d) 30.