Answer:
m = 115.36 kg = 1.15E2 kg
Step-by-step explanation:
First we find a conversion between demog (dmgs) and lbs. It is given that the boy weights 86.45 lbs in real world, while he ways 7.4 dmgs in upside down world. Therefore,
7.4 dmgs = 86.45 lbs
1 dmgs = (86.45 lbs)/7.4
1 dmgs = 11.6824 lbs ------------- equation (1)
Now, we convert the mass of demogorgon baby into lbs:
Mass of demogorgon baby = m = 21.75 dmgs
using conversion factor from equation (1)
m = (21.75 dmgs)(11.6824 lbs/1 dmgs)
m = 254.1 lbs
Now, we convert this mass into kg, by using the conversion factor given in question:
m = (254.1 lbs)(454 g/1 lbs)(1 kg/1000 g)
m = 115.36 kg = 1.15E2 kg