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Stells [14]
3 years ago
9

How do you get the area of quarter of a circle

Mathematics
1 answer:
topjm [15]3 years ago
4 0
Find the circumference of the whole circle,divide by 4,and then add the radius twice.
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If their were thirty cows and twenty ate chickens how many didn't?
tresset_1 [31]

Answer:

10 didn’t eat chickens

Step-by-step explanation:

30-20=10

6 0
3 years ago
Read 2 more answers
A population of values has a normal distribution with μ = 158.9 μ = 158.9 and σ = 90.4 σ = 90.4 . You intend to draw a random sa
rosijanka [135]

Answer:

P_{39}=133.68    

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 158.9

Standard Deviation, σ = 90.4

We are given that the distribution is a normal distribution.

Formula:

z_{score} = \displaystyle\frac{x-\mu}{\sigma}

We have to find the value of x such that the probability is 0.39

P( X < x) = P( z < \displaystyle\frac{x - 158.9}{90.4})=0.39  

Calculation the value from standard normal z table, we have,  

\displaystyle\frac{x - 158.9}{90.4} = -0.279\\\\x = 133.6784\approx 133.68  

P_{39}=133.68

133.68 separates the bottom 39% means from the top 61% means.

7 0
3 years ago
Two events, A and B, are independent of each other. P(A) = 1/6 and P(A and B) = 1/8 What is P(B) written as a decimal? Round to
Leona [35]
P(B) = 0.75.

For independent events, P(A and B) = P(A)*P(B).  This gives us

1/8 = 1/6(x)

Divide both sides by 1/6:
1/8 ÷ 1/6 = x
1/8 × 6/1 = x
6/8 = x
3/4 = x
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5 0
3 years ago
ABC is isosceles with AB=AC=8 units and BC=6 units. D and E are midpoints of AB and BC respectively. Calculate the length of DE?
Allushta [10]
The triangle is drawn and is shown in the image attached with.

We get two similar triangles. Triangle ABC and Triangle ADE. Since the triangles are similar the ratio of their corresponding sides will be the same. 

D and E are the midpoints of AB and BC, therefore, AD and AE are both 4 units in length. Using the property of similar triangles, we can say:

AD : DE= AB : BC
AD = 4 units
AB = 8 units
BC = 6 units
DE = unknown = x units

So,

4 :x = 8 : 6 \\  \\ &#10; \frac{4}{x} = \frac{8}{6}  \\  \\ &#10;x=4* \frac{6}{8}=3 &#10;

Therefore, the length of DE will be 3 units

6 0
3 years ago
Find the value of each variable. Write your answers in simplest radical form.
Vladimir79 [104]
1/2 by 3 equal 5 /1 so yea it’s easy that’s rights
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3 years ago
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