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alekssr [168]
3 years ago
8

The waiting times between a subway departure schedule and the arrival of a passenger are uniformly distributed between 0 and 5 m

inutes. Find the probability that a randomly selected passenger has a waiting time less than 1.75 minutes.
Mathematics
1 answer:
Grace [21]3 years ago
5 0

Answer:

0.35

Step-by-step explanation:

we know that

The formula to use for uniform distribution is equal to

P( X < x) = \frac{x-a}{b-a}

where,

b is the upper limit of the distribution which is 5 minutes in this case.

a is the lower limit of the distribution which is 0 minutes in this case.

x is the concerned value which is 1.75 minutes in this case.

substitute the given values

P( X< 1.75) = \frac{1.75-0}{5-0}=0.35

That means

The probability that a randomly selected passenger has a waiting time less than 1.75 minutes is 0.35

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Each one of the rectangles that make up the three dimensional figure is called a ___.
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Step-by-step explanation:

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Suppose that you take 120 mg of an antibiotic every 4 hr. The​ half-life of the drug is 4 hr​ (the time it takes for half of the
vodomira [7]

Answer:

The steady state amount of antibiotic in the bloodstream when t --> ∞ is 240 mg.

Step-by-step explanation:

Let the amount of antibiotic in one's bloodstream be given as Aₙ (where n = the number of half lives since the start of usage)

Let's follow the time line of events.

At t = 0 hr, the drug is taken

A₀ = 120 mg

At t = 4 hrs, n = 1, the drug is taken again

A₁ = (0.5×A₀) + 120

A₁ = (0.5×120) + 120 = 180 mg

At t = 8 hrs, n = 2, the drug is taken again,

A₂ = (0.5×A₁) + 120

A₂ = (0.5×180) + 120 = 210 mg

At t = 12 hrs, n = 3, the drug is taken again

A₃ = (0.5×A₂) + 120

A₃ = (0.5×210) + 120 = 225 mg

At this point, it becomes evident that at t = 4n hrs, n = n i.e. n half lives later, the general formula for the amount of the antibiotic in the bloodstream is

Aₙ = 0.5Aₙ₋₁ + 120

where Aₙ₋₁ = The amount of antibiotic in the bloodstream at the time t = 4(n-1) and (n-1) half lives later.

For infinite series, that are increasing in this order, as the value of n --> ∞,

Aₙ = Aₙ₋₁ = K

And our general formula becomes

K = 0.5K + 120

0.5K = 120

K = (120/0.5)

K = 240 mg

Hence, the steady state amount of antibiotic in the bloodstream when t --> ∞ is 240 mg.

Hope this Helps!!!

5 0
3 years ago
I need help on all of them T-T (I'm bad at math)
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Answer:

Once you upload a picture I'll help by editing my response :)

Step-by-step explanation:

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