Answer: 
Step-by-step explanation:
Given
Population of dust particle doubles every 30 minutes
If the initial sample is 21 grams
The model to predict the population will be

Where t=time in hours
A day has 24 hours . So, for 2 days time is 48 hours
Population is given by
Answer:
8
Step-by-step explanation:
2^2+2(4-2)
4+8-4
8
Hope this helps :D
Answer:
about 35 years rounding its 36
Step-by-step explanation:
i converted evrything to positive and did 1371 minus 1296 to get 75 and i divided that by 2.0834