Select two ratios that are equivalent to 16/12
2 answers:
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Answer:
Every decade, the number of species decays by a factor of 0.0834.
Step-by-step explanation:
Let be ,
. The decay rate per decay is deducted from the following relation:
Every decade, the number of species decays by a factor of 0.0834.
Answer:
12.16
Step-by-step explanation:
From your question, we have the following information
Mean = u = 20
Standard deviation sd = 4
P(X>Xo) = 0.975
1-0.975 = 0.025
P(z<Xo-20/4) = 0.025
Xo-20/4 = -1.96
We cross multiply
Xo - 20 = -1.96 x 4
Xo - 20 = -7.84
Xo = -7.84+30
Xo = 12.16
12.16 is the value of Xo and therefore the answer to this question.
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