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Volgvan
3 years ago
5

What is the radius of a circle with an area of 400(pi) cm^2?

Mathematics
1 answer:
ivanzaharov [21]3 years ago
5 0

Answer:  r≈11.28

Step-by-step explanation:

                         

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Again we have two methods, A and B, available for teaching a certain industrial skill. There is an 80% chance of successfully le
FinnZ [79.3K]

Answer:

Given that the worker learned the skill succesfully, there is a 71.64% probability that he was taught by method A.

Step-by-step explanation:

This can be formulated as the following problem:

What is the probability of B happening, knowing that A has happened.

It can be calculated by the following formula

P = \frac{P(B).P(A/B)}{P(A)}

Where P(B) is the probability of B happening, P(A/B) is the probability of A happening knowing that B happened and P(A) is the probability of A happening.

In this problem, we have that:

What is the probability that the worker was taught by method A, given that he learned the skill successfully.

P(B) is the probability that he was taught by method A. Method A is used 75% of the time. So P(B) = 0.75

P(A/B) is the probability that he learned the skill succesfully, given that he was taught by method A. There is an 80% chance of successfully learning the skill if method A is used, so P(A/B) = 0.8

P(A) is the probability that he learned the skill succesfully. Method A is used 75% of the time and is 80% succesfull. Method B is used 25% and is 95% succesful. So

P(A) = 0.75*0.8 + 0.25*0.95 = 0.8375

Finally

P = \frac{P(B).P(A/B)}{P(A)} = \frac{0.75*0.8}{0.8375} = 0.7164

Given that the worker learned the skill succesfully, there is a 71.64% probability that he was taught by method A.

4 0
2 years ago
2, 2, 2, 3, 4, 4, 11<br> What is the median of the seven data values shown
SCORPION-xisa [38]

Answer:

3

Step-by-step explain:

when you think of median, think of middle, the middle of those numbers is 3. When you have a even number of values for example i have 6 values and i have to find the median. I would look at the 2 middle numbers and come up with my median.

3 0
2 years ago
Read 2 more answers
Which of the following ordered pairs best describes the location of point B? help
alekssr [168]

Answer:

D

Step-by-step explanation:

7 0
3 years ago
both the red and blue line segments stretch from the center of the circle to a point on the circle. the legth of the blue line s
stiv31 [10]

Answer:

7.5

Step-by-step explanation:

It is longer than 5, so cross 2.5 and 5 out, 10 is too big, so 7.5 is the correct answer

4 0
2 years ago
PLS HELP ASAP NEED THIS NOW
mariarad [96]

Answer:

A

Step-by-step explanation:

<h3>Numerator</h3>

(3x)(3x) = 9x^2

√9x^2 = 3x

Numerator = 3x

<h3>Denominator</h3>

√18y^2 = √18 · √y^2

√18 = 3√2

√y^2 = y

3√2y

Denominator = 3√2y

Now we need to rationalize the denominator, and get rid of the square root on the bottom

\frac{3x}{3\sqrt{2} y} * \frac{3\sqrt{2} }{3\sqrt{2}} = \frac{6x\sqrt{2} }{12y} = \frac{x\sqrt{2} }{2y}

5 0
2 years ago
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