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mezya [45]
3 years ago
5

How quickly do synthetic fabrics such as polyester decay in landfills? A researcher buried polyester strips in thes oil for diff

erent lengths of time, then dug up the strips and measured the force required to break them. Breaking strength is easy to measure and is a good indicator of decay. Lower strength means the fabric is decayed. In part of the study researchers buried 10 strips of polyester fabric in well-drained soil in the summer. Five of the strips, chosen at random, were dug up after 2 weeks; the other 5 were dug up after 16 weeks. . Here are the data (in pounds of breaking strength): Sample 1 (2 weeks) 118 126 126 120 129 Sample 2 (16 weeks) 124 98 110 140 110 These data can be downloaded: Minitab data Excel or text data Find a 95% confidence interval for the difference in the mean breaking strengths, specifically the mean 2-week breaking strength minus the mean 16-week breaking strength.
Mathematics
1 answer:
ad-work [718]3 years ago
5 0

Answer:

no enough evidence to draw up a conclusion

Step-by-step explanation:

Data:

let: \mu _{1} = decay after 2 weeks

    \mu _{2} = decay after 16 weeks

Making the hypotheses:

Null hypothesis; H_{o} = \mu _{1}  - \mu _{2} = 0

the deviation = 0.05

the standard difference  = 4

Conditions:

The normal distribution curve can be plotted on a graph and the plot shows that the distribution is a skewed distribution.

Then,

t = \frac{(123.8-16.4)-0}{\sqrt{\frac{4.6^{2} }{5}+\frac{16.09^{2} }{5}   } } \\  = 0.989

Therefore, it can be concluded that 0.1983 > 0.05. This presents our failure to reject the null hypothesis.

Thus, there is not enough evidence to conclude that polyester decays more in less than 2 weeks.

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Factor the trinomial x^2 - 2x - 8
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Well what two numbers multiply to get -8 and add to get -2?
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8-1=7
-2+4=2
2-4=-2
1-8=-7
Thus it should be (-4,2),
This means we should get (X-4)(X+2)
7 0
3 years ago
If p(x) = 2x2 – 4x and q(x) = x – 3, what is mc007-1.jpg? 2x2 – 4x + 12 2x2 – 16x + 18 2x2 – 16x + 30 2x2 – 16x + 15
Rainbow [258]
P(x) = 2x² - 4xq(x) = x - 3
To find the answer, we plug q(x) into p(x):
p(q(x)) = 2(x - 3)² - 4(x - 3)p(q(x)) = 2(x² - 6x + 9) - 4x + 12p(q(x)) = 2x² - 12x + 18 - 4x + 12p(q(x)) = 2x² - 16x + 30
The third option is correct.

3 0
3 years ago
Read 2 more answers
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7 0
2 years ago
Answer correct for brainliest and also get a thanks !:-) you don't have to answer B.
skelet666 [1.2K]
I hope this helps you

7 0
3 years ago
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m_a_m_a [10]

Applying the division rule of exponents, 6^10/6^6 can be rewritten in the form of b^n as: 6^10/6^6 =  6^4.

<h3>What is the Division Rule of Exponents?</h3>

The division rule of exponents state that if we have a numerator and a denominator with the same base, the quotient will be the base, while we subtract the exponent value of the denominator from the exponent value of the numerator.

For example, if we have, a³/a², the division rule of exponents states that:

a^(3 - 2) = a^1 = a.

Given the expression, 6^10/6^6, we can rewrite the expression in the form of b^n by applying the division rule of exponents as shown below:

6^10/6^6 = 6^(10 - 6)

6^10/6^6 =  6^4

In conclusion, applying the division rule of exponents, 6^10/6^6 can be rewritten in the form of b^n as: 6^10/6^6 =  6^4.

Learn more about the division rule of exponents on:

brainly.com/question/2263967

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2 years ago
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