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3 years ago

I need help!!!!!!!!!

Mathematics

2 answers:

irina1246 [14]3 years ago

7 0

Syntax error wrong question

Sloan [31]3 years ago

5 0

Answer:

Greatest- 2 × 4/9

Then- 1 2/3 × 4/9

Then- 7/7 × 4/9

Lest- 3/4 × 4/9

Step-by-step explanation:

The right hand fraction you are timing by is the same whilst on the left they grow so you order them and dont focus on the times aspect of the question

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Farmers know that driving heavy equipment on wet soil compresses the soil and injures future crops. Here are data on the "penetr

Greeley [361]

Answer:

Step-by-step explanation:

Hello!

To see if driving heavy equipment on wet soil compresses it causing harm to future crops, the penetrability of two types of soil were measured:

Sample 1: Compressed soil

X₁: penetrability of a plot with compressed soil.

n₁= 20 plots

X[bar]₁= 2.90

S₁= 0.14

Sample 2: Intermediate soil

X₂: penetrability of a plot with intermediate soil.

n₂= 20 (with outlier) n₂= 19 plots (without outlier)

X[bar]₂= 3.34 (with outlier) X[bar]₂= 2.29 (without outlier)

S₂= 0.32 (with outlier) S₂= 0.24 (without outlier)

Outlier: 4.26

Assuming all conditions are met and ignoring the outlier in the second sample, you have to construct a 99% CI for the difference between the average penetration in the compressed soil and the intermediate soil. To do so, you have to use a t-statistic for two independent samples:

Parámeter of interest: μ₁-μ₂

Interval:

[(X[bar]₁-X[bar]₂)± $t_{n_1+n_2-2;1-\alpha/2}$ *Sa $\sqrt{\frac{1}{n_1} +\frac{1}{n_2} }$ ]

$t_{n_1+n_2-2;1-\alpha/2}= t_{20+19-2;1-(0.01/2)}= t_{37; 0.995}= 2.715$

$Sa= \sqrt{\frac{(n_1-1)S_1^2+(n_2-1)S_2^2}{n_1+n_2-2} } = \sqrt{\frac{19*0.0196+18*0.0576}{20+19-2} }= 0.195= 0.20$

[(2.90-2.29)±2.715*0.20 $\sqrt{\frac{1}{20} +\frac{1}{19} }$ ]

[0.436; 0.784]

I hope this helps!

5 0

3 years ago

Becky has 6 packages of clay thy each weigh 5 pounds. To make a bowl she needs 3 pounds of clay. How many bowls can Becky make?

n200080 [17]

Answer: HI SORRY I DON"T KNOW

Step-by-step explanation:

6 0

4 years ago

Read 2 more answers

For a 36-gon what is the sum of the exterior angles

Serhud [2]

Answer: It is 360°

Explanation:

For any polygon the sum of the exterior angles is always 360°

5 0

4 years ago

Given the sequence in the table below, determine the sigma notation of the sum for term 4 through term 15. N an 1 4 2 −12 3 36 t

Rzqust [24]

By applying basic property of Geometric progression we can say that sum of 15 terms of a sequence whose first three terms are 5, -10 and 2 is $\sum_{n=4}^{15} 5(-2)^{n-1}$$$

<h3>What is sequence ?</h3>

Sequence is collection of numbers with some pattern .

Given sequence

$a_{1}=5\\\\a_{2}=-10\\\\\\a_{3}=20$

We can see that

$\frac{a_1}{a_2}=\frac{-10}{5}=-2\\$

and

$\frac{a_2}{a_3}=\frac{20}{-10}=-2\\$

Hence we can say that given sequence is Geometric progression whose first term is 5 and common ratio is -2

Now $n^{th}$ term of this Geometric progression can be written as

$T_{n}= 5\times(-2)^{n-1}$

So summation of 15 terms can be written as

$\sum_{n=4}^{15} T_{n}\\\\$\\$\sum_{n=4}^{15} 5(-2)^{n-1}$$$

By applying basic property of Geometric progression we can say that sum of 15 terms of a sequence whose first three terms are 5, -10 and 2 is $\sum_{n=4}^{15} 5(-2)^{n-1}$$$

To learn more about Geometric progression visit : brainly.com/question/14320920

8 0

3 years ago

Use any method to prove that AABC with

Viefleur [7K]

Answer:

Step-by-step explanation:

the one with the least

4 0

3 years ago