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2 years ago

In a correlational study, ____.

Mathematics

1 answer:

maksim [4K]2 years ago

4 0

Answer:

Option B, two variables are measured and two groups are compared

Step-by-step explanation:

In a correlation study relationship between two variable is established.

The two variables represents two group.

For instance correlation study is conducted to determine the relationship between two variables X and Y

X and Y are variable

While X represents the group "number of cars passing through a lane"

Y represents the group "width of the road".

Hence, Option B is correct

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Answer:

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Step-by-step explanation:

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3 years ago

A certain compound has a half-life of four days. Write and use an exponential decay function to find the amount of compound rema

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Answer:

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Step-by-step explanation:

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Given that the half-life is 4 days, we can substitute in the formula to solve the rate of decay for a single half-life:

$P_t=P_oe^{rt}\\\\P_t=0.5P_o\\\\\therefore 0.5=e^{-4r}\\\\-4r=In(0.5)\\\\r=0.17329$

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