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3 years ago

PLEASE HELP!! What is the standard deviation of a data set whose values are all the same?

Mathematics

2 answers:

amm18123 years ago

7 0

Recall that the formula for standard deviation of a sample is:
s
=
√
∑
n
i
=
1
(
x
i
−
¯
x
)
2
n
−
1

DaniilM [7]3 years ago

5 0

Answer:

zero

Step-by-step explanation:

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A 41 gram sample of a substance that's used to detect explosives has a k-value of 0.1392. Find the substance's half life, in day

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Answer:

The substance half-life is of 4.98 days.

Step-by-step explanation:

Equation for an amount of a decaying substance:

The equation for the amount of a substance that decay exponentially has the following format:

$A(t) = A(0)e^{-kt}$

In which k is the decay rate, as a decimal.

k-value of 0.1392.

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$A(t) = A(0)e^{-0.1392t}$

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$A(t) = A(0)e^{-0.1392t}$

$0.5A(0) = A(0)e^{-0.1392t}$

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2 years ago

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Answer:

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