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iren [92.7K]
3 years ago
13

In a fictional study, a pretest-posttest design was used to examine the influence of a television program on children's aggressi

veness. The number of aggressive responses was measured during an observation period both before and after the television program. Determine if there is a difference in the number of aggressive behaviors in children after having viewed the television program. Before After 6 9 4 3 12 11 9 12 10 14 2 6 14 12 NOTE: If you need the standard deviations for any calculations, they are sBefore
Mathematics
1 answer:
ioda3 years ago
4 0

Answer: nationwide

Step-by-step explanation: is on ur side haha sorry not smart

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Divide 17 by 12

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

The initial population of 500 increases by 25% in 10 years.

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}

10r = \ln{1.25}

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

r = 0.0223

So

P(t) = 500e^{0.0223t}

What will be the population in 40 years

This is P(40).

P(t) = 500e^{0.0223t}

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

The population in 40 years will be 1220.

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225000000


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