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Neko
1 month ago
12

The four sides of a printed circuit board (PCB) enclosure consist of two pieces selected from a population whose mean length is

30 cm with standard deviation 0.14, and two pieces selected from a population whose mean length is 45 cm with standard deviation 0.31 cm. Assuming the four pieces are chosen independently, the standard deviation of the perimeter is

Mathematics
1 answer:
Svet_ta [12.7K]1 month ago
6 0
Let X1, X2 denote the lengths of two segments chosen from a population. The average length and standard deviation for these selections X1, X2 are 30 cm and 0.14 cm respectively. Let X2, X3 represent the lengths of another two pieces drawn from a population with mean length of 45 cm and standard deviation of 0.31 cm.
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Joan draws a bar chart to show the temperatures at midday on March 1st in five cities. Joan has made four mistakes in her diagra
tester [12383]

Answer:

Step-by-step explanation:

Characteristics of a bar graph include:

1). There must be uniform spacing between the bars or columns.

2). Each bar or column should have a consistent width.

3). All bars must share the same baseline.

4). The height of each bar corresponds to the data value.

Based on these criteria,

- Spacing between London-Paris and Rome-Oslo isn’t uniform.

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8 0
3 months ago
Read 2 more answers
.580 80 repeating as fraction
Svet_ta [12734]
To start, we will shift the non-repeating segment of the decimal to the left side by dividing by a power of 10.

Then we will assign a variable to represent the value and also shift the repeating segment to the left.

Essentially, the concept here is that we can denote the repeating portion with a variable, let's say "x", and move forward with the calculation;

\bf 0.580\overline{80}\implies \boxed{\cfrac{5.80\overline{80}}{10}}\qquad \textit{now, let's say }x= 5.80\overline{80}\\\\
-------------------------------

\bf thus\qquad \begin{array}{llll}
100\cdot x&=&580.80\overline{80}\\
&&575+5.80\overline{80}\\
&&575+x
\end{array}\qquad \implies 100x=575+x
\\\\\\
99x=575\implies x=\cfrac{575}{99}\qquad therefore\qquad \boxed{\cfrac{5.80\overline{80}}{10}}\implies \cfrac{\quad \frac{575}{99}\quad }{10}
\\\\\\
\cfrac{\quad \frac{575}{99}\quad }{\frac{10}{1}}\implies \cfrac{575}{99}\cdot \cfrac{1}{10}\implies \cfrac{575}{990}\implies \stackrel{simplified}{\cfrac{115}{198}}

you can verify that using your calculator.
4 0
2 months ago
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Danielle and Inder brought apples, bananas, and oranges to a fruit sale. The bananas were sold for $0.50 each, while the apples
Svet_ta [12734]
The answer is 10 apples.
4 0
2 months ago
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While driving from his home to his workplace, Chris has to pass through two traffic lights. The general probability of getting a
AnnZ [12381]
These occurrences are unlikely to take place!

I hope this is helpful
6 0
2 months ago
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Select all the lines that have a slope of 5/2.
Leona [12618]
A slope of 5/2 signifies that moving 2 units horizontally results in moving 5 units vertically. To visualize this, from any point on the line, shift 2 units right, and from there, move upwards until you intersect the line again. If the vertical movement is 5 units, the slope is confirmed to be 5/2. Option A indicates a slope of 5/2, B specifies a slope of 4/2, while C affirms the slope of 5/2. I can't clearly see the graphs represented in images D and E; however, E might have a slope of 5/2, which should be measured, and D clearly does not match the slope of 5/2, as it can be compared with A, demonstrating a significant difference, thus it can be eliminated.
6 0
2 months ago
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