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Studentka2010 [4]
3 years ago
15

Can anybody help me with this and show work ?? :)

Mathematics
1 answer:
ziro4ka [17]3 years ago
7 0

Answer: 3/2

Step-by-step explanation:

Just take the length of 1 side, for example LP, and count the length in units.

LP = 8 units

Now, L’P’ = 12 units, so divide the length of L’P’ by LP to get the factor of dilation.

12/8 = 3/2

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The weights of 67 randomly selected axles were found to have a variance of 3.85. Construct the 80% confidence interval for the p
VLD [36.1K]

Answer:

3.13

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 67

Variance = 3.85

We have to find 80% confidence interval for the population variance of the weights.

Degree of freedom = 67 - 1 = 66

Level of significance = 0.2

Chi square critical value for lower tail =

\chi^2_{1-\frac{\alpha}{2}}= 51.770

Chi square critical value for upper tail =

\chi^2_{\frac{\alpha}{2}}= 81.085

80% confidence interval:

\dfrac{(n-1)S^2}{\chi^2_{\frac{\alpha}{2}}} < \sigma^2 < \dfrac{(n-1)S^2}{\chi^2_{1-\frac{\alpha}{2}}}

Putting values, we get,

=\dfrac{(67-1)3.85}{81.085} < \sigma^2 < \dfrac{(67-1)3.85}{51.770}\\\\=3.13

Thus, (3.13,4.91) is the required 80% confidence interval for the population variance of the weights.

8 0
3 years ago
Which expression is a trinomial of degree 1?<br> A. x^3+x^2-x<br> B. xy^2<br> C. 6+x-y<br> D. 3x-y
ki77a [65]
C

Trinomial means three parts
A and C or trinomial's but the degree on a is at three and the degree of C is a one
7 0
3 years ago
Read 2 more answers
After spending some time looking for his pump, Marlon pumps up an uninflated balloon, pumping air into it at a constant rate. He
galina1969 [7]

Answer:

Graph D

Step-by-step explanation:

Initially, Marlon was looking for his pump. Thus, no air was pumped into the balloon until he got the pump. On getting the pump, he inflated the balloon with air at a constant rate, after which he tied it with a string to prevent the air from escaping.

The analysis is that, at the time he decided to inflate the balloon till he got a pump, the volume of air in the balloon is zero with respect to time. Pumping air at a steady rate into the balloon increases the volume of air flowing into it gradually and steadily.

When the volume got to a definite amount, he stopped pumping air and tied with a string. Thus, the volume of air in the balloon remains constant.

8 0
2 years ago
a baseball glove was on sale for 5/6 of the original price. if the original price was $90 what was the sale price
grandymaker [24]
 since the original price was ninety we have to multiply 5/6 by 90
90/1(5/6)
=450/6
=75

6 0
3 years ago
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A shop sells 3 types of boots football boots rugby boots and hiking boots sales are usually sold in the ratio 6:2:3 last moth 24
salantis [7]

Answer:

44

Step-by-step explanation:

The sum of the ratios is 6 + 2 + 3 = 11

Let b = total number of boots sold last week

If 24 football boots are sold, the equation representing this =

6/11 x b = 24

To solve for b, divide both sides by 11/6

b = 44 =  total number of boots sold last week

7 0
2 years ago
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