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viva [34]
3 years ago
15

Krishne wants to measure the mass and volume of a key. Which tools should she use?

Mathematics
2 answers:
pochemuha3 years ago
7 0

Answer:

water and beaker, and other science tools

Step-by-step explanation:

polet [3.4K]3 years ago
5 0

Answer:

a balance and a beaker of water

hope it helps mark as brainliest

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Many people use scanners to read documents and store them into pdf file. To help determine which brand of scanner to buy, a stud
konstantin123 [22]

The data is missing in the question. The data is provided below :

Document : 1     2      3      4      5     6      7      8

Brand A       17  29    18    14    21   25    22    29

Brand B       21  38    15    19    22   30    31   37

Solution :

State of the hypothesis of the null hypothesis and alternate hypothesis.

Null hypothesis : $h_A = h_B$

Alternate hypothesis : $h_A > h_B$

These hypothesis is a one tailed test. The null hypothesis will get rejected when the mean difference between the sample means is very small.

Significance level = 0.05

Therefore the standard error is :  $SE = \sqrt{(\frac{s^2_1}{n_1})+(\frac{s^2_2}{n_2})}$

                                                         = 3.602

And the degree of freedom, DF = 14

$t=\frac{(x_1-x_2)-d}{SE}$

 = -1.319

Here, $s_1$ = standard deviation of the sample 1

        $s_2$ = standard deviation of the sample 2

         $n_1$ = size of the sample 1

        $n_2$ = size of the sample 2

         $x_1$ = mean of the sample 1

        $x_2$ = mean of the sample 2      

          d = the hypothesis difference between the population mean

The observed difference in a sample means t static of -1.32. From t distribution calculator to determine P($t \leq -1.32$) = 0.1042  

Since the P value of 0.1042 is greater than significance level o 0.05, we therefore cannot reject the null hypothesis.

But from the test, we have no sufficient evidence that supports that Brand A is better than Brand B.      

8 0
3 years ago
Please help im stuck ​
kolbaska11 [484]
It looks like the first 3 are because they all are blank x2.5 but the last one would be 8x2.5=20..
6 0
3 years ago
Which of the following is not a major arc?<br> 148°
fgiga [73]
A major arc is over 180°.. minor arcs are under 180°... I think this is right
Hope this helps
6 0
3 years ago
8x−5x+4−x=Ax+B
yawa3891 [41]

Answer:

A = 2

B = 4

Step-by-step explanation:

To get an infinite number of solutions, both lines should be the same.

This means

A1x+ B1 = A2x + B2

So,

8x−5x+4−x=Ax+B

2x +4 = Ax +B

With this, we know the value of the coefficients

A = 2

B = 4

5 0
3 years ago
What is in the following sequence - 6, - 14 - 22,-30​
ozzi
-6,-14,-22,-30,-38,-46
7 0
2 years ago
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