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nikklg [1K]
3 years ago
9

the population of jamestown is decreasing by 250 people per year. if the population is 25,000 today, what will it be in two year

s
Mathematics
1 answer:
marta [7]3 years ago
3 0
26265 population ( even though calculation results in a fraction higher than 0.5 over this number, since the number represents people, you can not round it up to a whole person).

Solution: Treat this like a simple example of a compounded interest, where , like the interest earned on first year earns extra interest on it for next year; the increase in population at the end of a year, contributes to the growth rate, thus 2.5% compounded poverty two years, for 25,000/- people, results in 26,265.
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The reference desk of a university library receives requests for assistance. Assume that a Poisson probability distribution with
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Answer:

a) 0.125

b) 7

c) 0.875 hr

d) 1 hr

e) 0.875

Step-by-step explanation:l

Given:

Arrival rate, λ = 7

Service rate, μ = 8

a) probability that no requests for assistance are in the system (system is idle).

Let's first find p.

a) ρ = λ/μ

\frac{7}{8} = 0.875

Probability that the system is idle =

1 - p

= 1 - 0.875

=0.125

probability that no requests for assistance are in the system is 0.125

b) average number of requests that will be waiting for service will be given as:

λ/(μ - λ)

= \frac{7}{8 - 7}

= 7

(c) Average time in minutes before service

= λ/[μ(μ - λ)]

= \frac{7}{8(8 - 7)}

= 0.875 hour

(d) average time at the reference desk in minutes.

Average time in the system js given as: 1/(μ - λ)

= \frac{1}{(8 - 7)}

= 1 hour

(e) Probability that a new arrival has to wait for service will be:

λ/μ =

{7}{8}

= 0.875

5 0
3 years ago
X2 - 10x - 56 = 0 quadratics
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Answer:

Step-by-step explanation:

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6 0
3 years ago
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Dafna11 [192]

Answer:

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Step-by-step explanation:

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5 0
3 years ago
The coordinates of quadrilateral FGHJ are F(-5, -3), G(-3, 3), H(3, 5), and J(7, -1).
Eva8 [605]

Answer:

\large\boxed{d.\ (-4,\ 0)}

Step-by-step explanation:

The formula of a midpoint of a segment AB with endpoints at A(x₁, y₁) and B(x₂, y₂):

M_{AB}\left(\dfrac{x_1+x_2}{2},\ \dfrac{y_1+y_2}{2}\right)

We have the points F(-5, -3) and G(-3, 3).

Substitute:

M_{FG}(x,\ y)\\\\x=\dfrac{-5+(-3)}{2}=\dfrac{-8}{2}=-4\\\\y=\dfrac{-3+3}{2}=\dfrac{0}{2}=0

4 0
4 years ago
Do number 7 pleaseeee
blagie [28]
<h3>Answer:  c = 7p</h3>

Explanation:

Let's say 5 people get a lunch platter. The cost would be 7*5 = 35 dollars.

Or if 3 people got the lunch platter, then it would be 7*3 = 21 dollars

In general, the cost is 7p dollars where p is a placeholder for a whole number. So that's how we end up with c = 7p

5 0
2 years ago
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