Answer:
94.5 days
Step-by-step explanation:
We are asked to calculate the time.
The formula to calculate the time for half life =
t = t½ × In (Nt/No)/-In2
t½ = half life = 16 days
No = Initial substance = 120mg
Nt = Amount of substances after time t = 2 mg
t = 16 × In (2/120)/-In2
t = 94.510249529736 days
Approximately = 94.5 days
Therefore, the time it would take for the substance to decay from 120mg to 2 mg is 94.5 days.
1. the 3rd one
2. -9
3. 15
4. -8
1. 201.06 m
2. 1963.5 dm
3. 4536.46 mm
4. 17671.46 in
5. 254.47 cm
You just have to plug these numbers into the formula for area of a circle.
Answer:1,2,4,5, I just took the test
40%
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