Final answer:
Emma's backpack weighs 23 times as much as Jacob's backpack, so the correct estimate of the weight of Emma's backpack is 184 kilograms.
Step-by-step explanation:
Emma's backpack weighs 23 times as much as Jacob's backpack. Since Jacob's backpack weighs 8 kilograms, we can calculate the weight of Emma's backpack by multiplying 8 by 23. This gives us 184 kilograms. Therefore, the correct estimate of the weight of Emma's backpack is 184 kilograms (D).