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Sati [7]
3 years ago
8

Suppose that an outbreak of cholera follows severe flooding in an isolated town of 3662 people. Initially (Day 0), 36 people are

infected. Every day after, 34% of those still healthy fall ill.
How many people will be infected by the end of day 9?
Mathematics
1 answer:
denis23 [38]3 years ago
6 0

Answer:

3576 infected people

Step-by-step explanation:

We have to apply the following formula, which tells us the number of healthy people:

A = p * (1 - r / 100) ^ t

where,

p = initial population,

r = rate of change per period (days)

t = number of periods (days)

Now, we know that the initial population is 3,662 but there are already a total of 36 infected, therefore:

3662 - 36 = 3626

that would be our p, now, we replace:

A = 3626 * (1 - 34/100) ^ 9

A = 86.16

Therefore, those infected would be:

3662 - 86.16 = 3575.84

This means that there are a total of 3576 infected people.

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(5y 3 + 20y 2 – 12)(2y3 - 15y2 + 4y + 16)
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Step-by-step explanation:

8 0
2 years ago
If x^2-x-6 and x^2+3x-18 hacpve a common factor (x-a) then find the value of a.​
DedPeter [7]

Answer:

a = 3

Step-by-step explanation:

Factor both expressions

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Consider the factors of the constant term (- 6) which sum to give the coefficient of the x- term (- 1)

The factors are - 3 and + 2 , since

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-----------------------------------

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consider factors of constant term (- 18) which sum to give the coefficient of the x- term (+ 3)

The factors are + 6 and - 3 , since

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Both expressions have a common factor of (x - 3)

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3 0
2 years ago
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04. A school band charges a $160 flat fee plus $40 an hour to play.
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Answer:

Step-by-step explanation:

\frac{320-160}{40}=\frac{160}{40}=4

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3 0
3 years ago
What is the sum of 347+645=
iren [92.7K]

Answer:

347 + 645 = 992

Step-by-step explanation:

 347

<u>+645</u>

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