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3 years ago

14 = r - 9 Solve for r

Mathematics

1 answer:

Igoryamba3 years ago

7 0

Answer:

Step-by-step explanation:

14=r-9

23=r

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During the calendar year of 1971 a total of 171 deaths were caused by influenza in a city of 450,000 persons. The temporal distr

masha68 [24]

Answer and Step-by-step explanation:

The computation of annual and quarterly mortality rates per 100,000 population is shown below:-

Quarterly mortality rates are

$= \frac{Deaths}{Population\ in\ the\ city}\times Population$

For the first quarter

$= \frac{54}{450,000}\times 100,000$

= 12 death per 100,000 population

For the second quarter

$= \frac{43}{450,000}\times 100,000$

= 9.5 death per 100,000 population

For the third quarter

$= \frac{35}{450,000}\times 100,000$

= 7.7 death per 100,000 population

For the fourth quarter

$= \frac{39}{450,000}\times 100,000$

= 8.6 death per 100,000 population

Now the annual mortality is

$= \frac{Deaths}{Population\ in\ the\ city}\times Population$

$= \frac{171}{450,000}\times 100,000$

= 38 death per 100,000 population

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3 years ago