The percentage of the original sample that is left after 115 days is; 23.4733%
<h3>How to calculate the decay percentage?</h3>
Formula for radioactive decay is;
A = A₀ * (1/2)^(t/t_¹/₂)
where;
A = quantity of the substance remaining
A₀ = initial quantity of the substance
t = time elapsed
t_¹/₂ = half life of the substance
Thus;
A/A₀ = (1/2)^(115/55)
A/A₀ = 0.234733 or 23.4733%
Read more about decay constant at; brainly.com/question/11117468
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Step-by-step explanation:
distance = -6-(-2) and 4-2
-6+2 and 2
-4 and 2 is distance
Answer:
77 and 91
Step-by-step explanation:
So essentially, half 168 and half 14. You're left with 84 and 7. So, subtract 7 from 84 and add 7 to 84. You're left with 77 and 91. To verify, just add them both up and you'll see they equal 168. Then, subtract 77 from 91 and you'll see that 91 is 14 more than 77 :)
Type this question, It is blurry.
Answer:
b=5
Step-by-step explanation:
10 = -2b + 4b
Combine like terms
10 = 2b
Divide each side by 2
10/2 = 2b/2
5 = b
