This is an easy half-life calculation because it involves an exact integer of half-lives. 1,104 days is precisely 8 half-lives. After each half-life, one half of the original remains.
So, after 8 half-lives you will have 1 / 2^8 of the original material left.
So we start with 30 grams and 1 / 2^8 =
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0.00390625</span></span></span>.
We are therefore left with (30 *
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<span>
0.00390625) or </span></span></span>
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0.1171875 grams of the original 30 grams of polonium.
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Step-by-step explanation:
that is the step by step
brainliest please
Answer:
5/-1
Step-by-step explanation:
y1-y2/x1-x2
Answer: b. 0.98
Step-by-step explanation:
The formula to find the maximum error of the estimated mean :
(1)
, where
= standard deviation
n= Sample size
z* = Critical z-value.
As per given , we have

n=100
Critical value for 95% confidence interval = z*=1.96
Put these values in the formula (1), we get


Hence, the maximum error of the estimated mean quality for a 95% level of confidence is 0.98.
Therefore , the correct answer is b. 0.98 .
The answer is 3. I hope this helps :))