Answer:

Step-by-step explanation:
<em>Set the problem up as a proportion</em>
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<em>cross multiply</em>
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<em>divide both sides by 30</em>
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<em>plz mark me brainliest. :)</em>
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:
Step-by-step explanation:
84 = 2 * 2 *3 * 7
It is rounded to the nearest tens. You can only round when you have 1,9. Hope I helped
Answer:
[-3, 3]
Step-by-step explanation:
The function/ graph is defined from -3 to 3, inclusive of those values