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2 years ago

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Biology

1 answer:

Hunter-Best [27]2 years ago

6 0

The Equator line does not pass through the north and south poles. This line divides the Earth's planet into two hemispheres.

The Equator can be defined as an invisible line located at the center of the Earth (0 degrees latitude).

This invisible line (Equator) divides the Earth into two hemispheres: the northern hemisphere and the southern hemisphere.

The Equator is a circle of latitude, and the distance of this imaginary line is approximately 40,000 km in circumference.

Learn more about the Equator line in:

brainly.com/question/16876469

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Members of a given species _____.

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Can produce fertile offspring

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3 years ago

g If a person takes a prescribed dose of 10 milligrams of Valium, the amount of Valium in that person's bloodstream at any time

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Answer:

a. 8.1 milligrams

b. 40.07 hours

c. 8.859 milligrams

Explanation:

If a person takes a prescribed dose of 10 milligrams of Valium, the amount of Valium in that person's bloodstream at any time can be modeled by

$A_{t}=10e^{-0.0173t}$

Where A(t) = amount of Valium remaining in the blood after t hours

t = time or duration after the drug is taken

a. we have to calculate the amount of drug remaining in the bloodstream after 12 hours

$A_{12}=10e^{-0.0173\times12}$

$A_{12}=10e^{-0.2076}$

= 10×0.81253

= 8.1 milligrams

b. In this part we have to calculate the time when A(t) = 5 milligrams

$5=10e^{-0.0173\timest}$

$\frac{5}{10}=e^{-0.0173t}$

0.5 = $e^{-0.0173t}$

Now we take natural log on both the sides of the equation.

ln(0.5) = ln( $e^{-0.0173t})$

-0.69314 = -0.0173t

t = $\frac{0.69314}{0.0173}$

t = 40.0658

≈ 40.07 hours

c. In this part we have to calculate the rate, by which amount of drug will decay in the bloodstream after 7 hours.

$A_{7}=10e^{-0.0173\times7}$

$A_{7}=10e^{-0.1211}$

= 10×0.8859

= 8.859 milligrams

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