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elena-s [515]
3 years ago
11

What is the formula for the area a of a circle in terms of radius r ​

Mathematics
1 answer:
MArishka [77]3 years ago
6 0

<em>The</em><em> </em><em>formula</em><em> </em><em>for</em><em> </em><em>the</em><em> </em><em>ar</em><em>e</em><em>a</em><em> </em><em>of</em><em> </em><em>a</em><em> </em><em>c</em><em>i</em><em>r</em><em>c</em><em>l</em><em>e</em><em> </em><em>in</em><em> </em><em>terms</em><em> </em><em>of</em><em> </em><em>radius</em><em> </em><em>is</em><em> </em><em>pie</em><em> </em><em>r^2</em><em>.</em>

<em> </em><em>For</em><em> </em><em>example</em><em>:</em>

<em>r=</em><em>2</em>

<em>area</em><em> </em><em>of</em><em> </em><em>circle</em><em> </em><em>=</em><em>p</em><em>i</em><em>e</em><em> </em><em>r^2</em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em>2</em><em>2</em><em>/</em><em>7</em><em>*</em><em>(</em><em>2</em><em>)</em><em>^</em><em>2</em>

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em>2</em><em>2</em><em>/</em><em>7</em><em>*</em><em>4</em>

<em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em> </em><em>=</em><em>1</em><em>2</em><em>.</em><em>5</em><em>7</em>

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Which of the following summary measures for forecast errors does not depend on the units of the forecast variable? a. MFE (mean
Orlov [11]

Answer:

d. The mean absolute percentage error (MAPE) does not depend on the units of the forecast variable.

Step-by-step explanation:

A forecast error is the difference between the actual or real and the predicted or forecast value of a time series or any other phenomenon of interest. Here “error” does not mean a mistake, it means the unpredictable part of an observation.

There are many different ways to summarize forecast errors in order to provide meaningful information.

Scale-dependent errors. The forecast errors are on the same scale as the data. The two most commonly used scale-dependent measures are based on the absolute errors or squared errors:

\begin{align*}  \text{Mean absolute error: MAE} & = \text{mean}(|e_{t}|),\\  \text{Root mean squared error: RMSE} & = \sqrt{\text{mean}(e_{t}^2)}.\end{align*}\text{Mean absolute error: MAE} & = \text{mean}(|e_{t}|),\\  \\\text{Root mean squared error: RMSE} & = \sqrt{\text{mean}(e_{t}^2)}.

Percentage errors. Percentage errors have the advantage of being unit-free, and so are frequently used to compare forecast performances between data sets. The most commonly used measure is:

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6 0
3 years ago
What is 69*773 I just need some help getting the answer?
mixer [17]

Answer:

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Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Please help me!
rewona [7]

Answer:

12(j+t) + 15 = c

Step-by-step explanation:

So, lets go over what we know.

First off, for simplicity, lets consider Johnathan as J, and Trina as T.

We know that both J and T produce 12 dollars each per hour.

We know that J gets a extra 15 dollars.

We can think of the amount they produce each hour as the time they work in total, times the money they make a hour, which is 12.

We can think of this first part where the total time they work is (J + T)

The 12 dollars they get an hour can be though of as multiplying this sum: 12(J+T)

Finally, we know that J gets an extra 15 dollars.

This is not dependent on time, like the other variables, so we simply add it to the sum of what they make in the end:

12(J+T)+15

This looks like answer C.

Answer:

C

Hope this helps!

6 0
2 years ago
Find the coordinates of the midpoint of the segment whose endpoint are H(3,2) and K(9,6)​
lutik1710 [3]

Answer:

midpoint P(6, 4)

Step-by-step explanation:

\frac{x1 + x2}{2}  \\  \frac{y1 + y2}{2}

\frac{9 + 3}{2}  = 6 = x \: mid \: point \\

\frac{6 + 2}{2}  = 4 = y \: mid \: point

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levacccp [35]
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8 0
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