3 years ago

If the mean of the following distribution is 91 and sum of frequencies is 150 find x and y

Mathematics

1 answer:

nydimaria [60]3 years ago

7 0

Answer:

Step-by-step explanation:

Mean = ∑x/ N

91 = ∑x / 150

∑x = 150 * 91 = 13650

x= 6825 and y = 6825

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inn [45]

Answer:

The father is 40 and the son is 4.

Step-by-step explanation:

40 + 5 = 45.

4 +5=9.

45 divided by 5 = 9

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3 years ago

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Answer:

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3 years ago

The population of a town grows at a rate proportional to the population present at time t. The initial population of 500 increas

Mazyrski [523]

Answer:

The population in 40 years will be 1220.

Step-by-step explanation:

The population of a town grows at a rate proportional to the population present at time t.

This means that:

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

In which P(t) is the population after t years, P(0) is the initial population and r is the growth rate.

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This means that $P(0) = 500, P(10) = 1.25*500 = 625$

We apply this to the equation and find t.

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

$625 = 500e^{10r}$

$e^{10r} = \frac{625}{500}$

$e^{10r} = 1.25$

Applying ln to both sides

$\ln{e^{10r}} = \ln{1.25}$

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$r = \frac{\ln{1.25}}{10}$

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$P(40) = 500e^{0.0223*40} = 1220$

The population in 40 years will be 1220.

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3 years ago

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Marta_Voda [28]

Answer:

conversion factor

Step-by-step explanation:

that is what I found on the internet

hope it helps :)

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3 years ago