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3 years ago

How do you find arc measures? someone please explain this

Mathematics

2 answers:

Mkey [24]3 years ago

6 0

Answer:

talk to me i hope this helps! :)

Step-by-step explanation:

How To Find Arc Length You need to know the measurement of the central angle that created the arc (the angle of the two radii) to calculate arc length. The arc length is the fractional amount of the (outside border of something/distance around the outside of a circle) of the circle. The (outside border of something/distance around the outside of a circle) of any circle is found with 2 Ï r where r = the radius.

stiks02 [169]3 years ago

5 0

Answer:

How To Find Arc Length You need to know the measurement of the central angle that created the arc (the angle of the two radii) to calculate arc length. The arc length is the fractional amount of the circumference of the circle. The circumference of any circle is found with 2 π r where r = r a d i u s.

Step-by-step explanation:

You might be interested in

Im in Algebra What is <br>2r-6+5r=3-r+7

worty [1.4K]

2r-6+5r=3-r+7

7r-6=10-r

7r+r=10+6

8r=16

r=16/8

r=2

7 0

3 years ago

The lifetime of a certain type of TV tube has a normal distribution with a mean of 61 and a standard deviation of 6 months. What

Ad libitum [116K]

Answer:

$P(57$

$P(-0.67$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the lifetime for a TV of a population, and for this case we know the distribution for X is given by:

$X \sim N(61,6)$

Where $\mu=61$ and $\sigma=6$

We are interested on this probability

$P(57$

And the best way to solve this problem is using the normal standard distribution and the z score given by:

$z=\frac{x-\mu}{\sigma}$

If we apply this formula to our probability we got this:

$P(57$

And we can find this probability like this:

$P(-0.67$

And in order to find these probabilities we can use tables for the normal standard distribution, excel or a calculator.

$P(-0.67$

6 0

3 years ago

Explain how you know 21/100 is greater than 1/5

Nataly_w [17]

This problem can be solved using equivalent fractions. The first step in resolving this problem is to realize that fractions are best compared when they both have the same denominator. In this case, I will choose to make that common denominator 100. There is no need to rewrite the fraction $\frac{21}{100}$ as the denominator for this fraction is already 100. The fraction $\frac{1}{5} =\frac{20}{100}$ . This is achieved by multiplying both the numerator and denominator by 20. Now that the two fractions have the same denominator, we can easily see that $\frac{21}{100}$ is greater than $\frac{1}{5}$ because it is greater than its equivalent fraction.