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Elena-2011 [213]

3 years ago

13

What does N represent

2 answers:

Alona [7]3 years ago

8 0

Answer:

The symbol 'n,' represents the total number of individuals or observations in the sample.

Taya2010 [7]3 years ago

6 0

Answer:

The principal quantum number, n, describes the energy of an electron and the most probable distance of the electron from the nucleus. In other words, it refers to the size of the orbital and the energy level an electron is placed in. The number of subshells, or l, describes the shape of the orbital.

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Pregnant women metabolize some drugs at a slower rate than the rest of the population. The half-life of caffeine is about 4 hour

UkoKoshka [18]

Answer:

Husband:

The husband will have 16.35 mg of caffeine in his body at 7 pm.

Woman:

The pregnant woman will have 51.33 mg of caffeine in her body at 7 pm.

Step-by-step explanation:

The amount of caffeine in the body can be modeled by the following equation:

$C(t) = C(0)e^{rt}$

In which C(t) is the amount of caffeine t hours after 8 am, C(0) is how much coffee they took and r is the rate the the amount of caffeine decreases in their bodies.

110 mg of caffeine at 8 am,

So $C(0) = 110$

Husband

Half life of 4 hours. So

$C(4) = 0.5C(0) = 0.5*110 = 55$

$C(t) = C(0)e^{rt}$

$55 = 110e^{4r}$

$e^{4r} = 0.5$

Applying ln to both sides

$\ln{e^{4r}} = \ln{0.5}$

$4r = \ln{0.5}$

$r = \frac{\ln{0.5}}{4}$

$r = -0.1733$

So for the husband

$C(t) = 110e^{-0.1733t}$

At 7 pm

7 pm is 11 hours after 8 am, so this is C(11)

$C(t) = 110e^{-0.1733t}$

$C(11) = 110e^{-0.1733*11} = 16.35$

The husband will have 16.35 mg of caffeine in his body at 7 pm.

Pregnant woman

Half life of 10 hours. So

$C(10) = 0.5C(0) = 0.5*110 = 55$

$C(t) = C(0)e^{rt}$

$55 = 110e^{10}$

$e^{10r} = 0.5$

Applying ln to both sides

$\ln{e^{10r}} = \ln{0.5}$

$10r = \ln{0.5}$

$r = \frac{\ln{0.5}}{10}$

$r = -0.0693$

At 7 pm

7 pm is 11 hours after 8 am, so this is C(11)

$C(t) = 110e^{-0.0693t}$

$C(11) = 110e^{-0.0693*11} = 51.33$

The pregnant woman will have 51.33 mg of caffeine in her body at 7 pm.

7 0

4 years ago

A single card is drawn at random from a standard 52 card deck.

Sholpan [36]

Answer:

Step-by-step explanation:

P(8)

There are 4 eights in a standard deck (no jokers) So the probability is 4/52 = 1/13 = 0.0769

P( ~ 8)

48 cards in a standard deck are not 8

P( ~8) = 12/13 = 0.9231

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3 years ago

Question 2: use the image and your knowledge of the isosceles triangle to find the value of x

pav-90 [236]

Answer:

x is 66 degrees

Step-by-step explanation:

since its a isosceles, two of the angles should be the same.

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3 years ago

PLEASE HELP ME!!!! I HAVE 2 ATTEMPTS LEFT FOR THIS PROBLEM!!! I DID THE FIRST 2 BUT PLEASE HELP WITH THE OTHER 2!!!!!

RSB [31]

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Step-by-step explanation:

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kirill115 [55]

Answer:

are possible awnsers

Step-by-step explanation:

a b and e

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3 years ago

Read 2 more answers