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3 years ago

Kelly has nine pieces of ribbon. She recorded the length of each piece in the line plot shown.

Mathematics

1 answer:

Ugo [173]3 years ago

6 0

Answer: 44 inches

Step-by-step explanation:

The 3 longest are 14.5 14.5 and 15 so the answer is adding them and 44 is the answer.

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A student repeatedly measures the mass of an object using a mechanical balance and gets the following values: 560 g, 562 g, 556

MrRissso [65]

Answer: 2.76 g

Step-by-step explanation:

The formula to find the standard deviation:-

$\sigma=\sqrt{\dfrac{\sum(x_i-\overline{x})^2}{n}}$

The given data values : 560 g, 562 g, 556 g, 558 g, 560 g, 556 g, 559 g, 561 g, 565 g, 563 g.

Then, $\overline{x}=\dfrac{\sum_{i=1}^{10} x_i}{n}\\\\\Rightarrow\ \overline{x}=\dfrac{560+562+556+558+560+556+559+561+565+563}{10}\\\\\Rightarrow\ \overline{x}=\dfrac{5600}{10}=560$

Now, $\sum_{i=1}^{10}(x_i-\overline{x})^2=0^2+2^2+(-4)^2+(-2)^2+0^2+(-4)^2+(-1)^2+1^2+5^2+3^2\\\\\Rightarrow\ \sum_{i=1}^{10}(x_i-\overline{x})^2=76$

Then, $\sigma=\sqrt{\dfrac{76}{10}}=\sqrt{7.6}=2.76$

Hence, the standard deviation of his measurements = 2.76 g

6 0

3 years ago

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. brands of cereal

Blababa [14]

This is an example of a nominal level of measurement.

In a nominal level of measurement, we are just classify the type of a variable. In this case, we are assigning a specific brand type to a particular cereal.

8 0

3 years ago

Make a table of values for the following equation:

loris [4]

*Not 100% sure what you want but here goes*

Step-by-step explanation:

So what you do is create a table for this example label the x values say -2 through 2. Then you plug in the x value to the equation so for 2 its y= 2(2)+5 which is 9. Continue this for the rest of the graph and that should do it.

Hope this helps

3 0

2 years ago

Read 2 more answers

What is the volume of a cone with a radius of 2 and a height of 19?

kykrilka [37]

Remember that the cone volume formula is $V=\pi r^2\frac{h}{3}$ , with r = radius and h = height. Using our information, we can form our equation as such: $V=\pi 2^2\frac{19}{3}$ (I'll be keeping the answer in pi form.)

Firstly, solve the exponents: $V=\pi 4\frac{19}{3}$

Next, multiply 4 and 19/3 together and your answer should be (rounded to the hundreths): V = 25.33π un^3

5 0

3 years ago

Read 2 more answers

In right triangle CAB, find the hypotenuse, CB A 4 root 13 B 20 C 4 root 5 D 208

svetoff [14.1K]

Answer:

Step-by-step explanation:

4 0

3 years ago