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Lunna [17]
3 years ago
6

What does -1/2 * 1/2 = to

Mathematics
2 answers:
Igoryamba3 years ago
4 0
-.25   or  -1/4

that's the answer
sertanlavr [38]3 years ago
3 0
The answer is -1/4.

Hope this helps
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Find the area of a space figure is its a rectagle with triangle on each end
vladimir1956 [14]
Formula for surface area of a triangular prism: bh+2ls+lb
(7*4)+2(8*5)+(8*7)
28+80+56
=164 cm^2
5 0
3 years ago
Currently, there are 1,460 wolves in Scataway National Park. If the population of wolves is growing at a rate of 6% every year,
VARVARA [1.3K]

Answer:

P(t) = 1460(1.06)^t

Step-by-step explanation:

Exponential equation for population growth:

The exponential equation for a population after t years is given by:

P(t) = P(0)(1+r)^t

In which P(0) is the initial population and r is the growth rate, as a decimal.

Currently, there are 1,460 wolves in Scataway National Park.

This means that P(0) = 1460

Growing at a rate of 6% every year:

This means that r = 0.06. So

P(t) = P(0)(1+r)^t

P(t) = 1460(1+0.06)^t

P(t) = 1460(1.06)^t

6 0
3 years ago
Factorise<br>1) 9a^2 - 6a​
Dafna1 [17]

Answer:

9a^2 - 6a

taking common

3a(3a-2)

6 0
2 years ago
Suppose 45% of the population has a college degree.
levacccp [35]

Using the normal distribution, there is a 0.2076 = 20.76% probability that the proportion of persons with a college degree will differ from the population proportion by greater than 3%.

<h3>Normal Probability Distribution</h3>

The z-score of a measure X of a normally distributed variable with mean \mu and standard deviation \sigma is given by:

Z = \frac{X - \mu}{\sigma}

  • The z-score measures how many standard deviations the measure is above or below the mean.
  • Looking at the z-score table, the p-value associated with this z-score is found, which is the percentile of X.
  • By the Central Limit Theorem, for a proportion p in a sample of size n, the sampling distribution of sample proportion is approximately normal with mean \mu = p and standard deviation s = \sqrt{\frac{p(1 - p)}{n}}, as long as np \geq 10 and n(1 - p) \geq 10.

The proportion estimate and the sample size are given as follows:

p = 0.45, n = 437.

Hence the mean and the standard error are:

  • \mu = p = 0.45
  • s = \sqrt{\frac{p(1 - p)}{n}} = \sqrt{\frac{0.45(0.55)}{437}} = 0.0238

The probability that the proportion of persons with a college degree will differ from the population proportion by greater than 3% is <u>2 multiplied by the p-value of Z when X = 0.45 - 0.03 = 0.42</u>.

Hence:

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem:

Z = \frac{X - \mu}{s}

Z = (0.42 - 0.45)/0.0238

Z = -1.26

Z = -1.26 has a p-value of 0.1038.

2 x 0.1038 = 0.2076.

0.2076 = 20.76% probability that the proportion of persons with a college degree will differ from the population proportion by greater than 3%.

More can be learned about the normal distribution at brainly.com/question/28159597

#SPJ1

8 0
2 years ago
Ellen has a 78% chance of making a free
Goryan [66]

Answer:

0.91

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
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