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olchik [2.2K]
3 years ago
9

Find the arc length of the semicircle. Either enter an exact answer in terms of π or use 3.14 for π and enter your answer as a d

ecimal.

Mathematics
1 answer:
PSYCHO15rus [73]3 years ago
6 0

Answer:

Step-by-step explanation:

The formula for the length of an arc is s = rФ.

Thus, the arc length of a semicircle is S = rФ/2.

Here the radius is 5 (half the diameter), and so in this case the arc length is

S = (5 units)π/2, or S = (5/2)(3.14) units, or approximately S = 7.85 units

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Rikki decided to collect data to determine if a runner's time and speed are correlated. She determined the data to have a correl
balandron [24]

The value of r indicates the negative correlation.

<h2>Given </h2>

Rikki decided to collect data to determine if a runner's time and speed are correlated.

She determined the data to have a correlation coefficient of -0. 5.

<h3>What is the correlation coefficient?</h3>

The correlation coefficient is a statistical measure that calculates the strength of the relationship between the relative movements of the two variables.

She determined the data to have a correlation coefficient of -0. 5.

Here, the coefficient is negative which is -0.5.

This correlation coefficient indicates that there exists a weak negative correlation between the runner’s time and the speed.

This relation is negative because the correlation coefficient is negative.

Hence, The value of r indicates the negative correlation.

To know more about the Correlation coefficient click the link given below.

brainly.com/question/19043872

4 0
2 years ago
Two numbers such that the greater number is 75 percent more than the lesser number
victus00 [196]
<h2>Greetings!</h2>

If x = the first number (equal to 1x) then the second number is 75% more than this.

This means the value of the bigger number is 100 + 75 (because 100 is the starting number and 75 is the percent bigger)

This can be shown with the following equation:

Amount * \frac{percentage}{100}

x *  \frac{175}{100} = 1.75x

1.75x is the value of the bigger number.


<h2>Hope this helps!</h2>
8 0
3 years ago
What is the multiplicative identity of -12/13
Nata [24]

Answer:

The number '1' is called the 'multiplicative identity' of a number '-12/13' because it does not change the number '-12/13' after getting multiplied by it.

Therefore, option (B) is true.

Step-by-step explanation:

We know that when a number let say 'n' get multiplied by '1', it remains unchanged.

i.e.

  • n × 1 = n
  • 1 × n = n

The number '1' is called the 'multiplicative identity' of a number 'n' because it does not change the number 'n' after getting multiplied by it.

Given the number

-12/13

Multiply the number '-12/13' by '1'.

i.e.

-12/13 × 1 = -12/13

1 × -12/13 = -12/13

Thus, the number '1' is called the 'multiplicative identity' of a number '-12/13' because it does not change the number '-12/13' after getting multiplied by it.

Therefore, option (B) is true.

5 0
3 years ago
Solve 4 | x + 7 |= 24.
Nana76 [90]

Answer: x = -1, -13

Step-by-step explanation:

7 0
2 years ago
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Catherine graphed point P on the coordinate grid. She will graph point Q at a location that is 4 units left and 3 units up from
patriot [66]
The answer to your question is (4,1)
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3 years ago
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