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3 years ago

Find the length of radius r. 9.9 13 7

Mathematics

1 answer:

dem82 [27]3 years ago

4 0

Answer:

Radius = 7

Step-by-step explanation:

Since BA is tangent to circle O, it creates a 90° angle with the radius

Therefore, you can use Pythagorean theorem to solve this problem

a² + b² = c²

Let's say a is the radius

b is 5

c is 8.6

a² + 5² = 8.6²

a² + 25 = 73.96

Subtract 25 from both sides

a² = 48.96

Root both sides

a ≈ 6.997142274

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Suppose I have an urn with 9 balls: 4 green, 3 yellow and 2 white ones. I draw a ball from the urn repeatedly with replacement.

Mrrafil [7]

Answer:

$E(X_n)=\frac{2(n-1)}{27}$

$E(y)=\frac{14}{9}$

Step-by-step explanation:

From the question we are told that:

Sample size n=9

Number of Green $g=4$

Number of yellow $y=4$

Number of white $w=4$

Probability of Green Followed by yellow P(GY) ball

$P(GY)=\frac{4}{9}*\frac{3}{9}$

$P(GY)=\frac{4}{27}$

Generally the equations for when n is even is mathematically given by

$Probability of success P(S)=\frac{4}{27}$

$Probability of Failure P(F)=\frac{27-4}{27}$

$Probability of Failure P(F)=\frac{23}{27}$

Therefore

$E(X_n)=\frac{n}{2}*P$

$E(X_n)=\frac{n}{2}*\frac{4}{27}$

$E(X_n)=\frac{2n}{27}$

Generally the equations for when n is odd is mathematically given by

$\frac{n-1}{2}$

$E(X_n)=\frac{n-1}{2}*\frac{4}{27}$

$E(X_n)=\frac{2(n-1)}{27}$

Probability of drawing white ball

$P(w)=\frac{2}{9}$

Therefore

$E(w)=\frac{1}{p}$

$E(w)=\frac{1}{\frac{2}{9}}$

$E(w)=\frac{9}{2}$

Therefore

$E(y)=[E(w)-1]\frac{4}{9}$

$E(y)=[\frac{9}{2}-1]\frac{4}{9}$

$E(y)=\frac{14}{9}$

5 0

2 years ago

A new playground is in the shape of a square. on a scale drawing, the vertices of the playground’s coordinates are: (6,0.5)

Lisa [10]

What is the question exactly? What is it you are trying to find?

4 0

3 years ago

F(×)= 5×-10. What is the vaule of f^-1 (-3)

Katena32 [7]

If I’m not mistaken I think this is what you’re asking for?

4 0

2 years ago

What is the qoutient of 1/6 and 2/9

beks73 [17]

Answer:

$\frac{3}{4}$

Step-by-step explanation:

To find the quotient, we first need to know what quotient means.

Quotient is the solution to division problems.

So here is how we have to do this, first we identify our fractions:

$\frac{1}{6} and \frac{2}{9}$

Next, we must turn the fraction we are dividing by into a reciprocate:

$\frac{2}{9} turns into \frac{9}{2}$

Now we have $\frac{1}{6} and \frac{9}{2}$

Next, we multiply!:

$\frac{1}{6} x \frac{9}{2} = \frac{9}{12}$

Simplified:

$\frac{3}{4}$

8 0

3 years ago

Read 2 more answers

94÷4≈

Tanya [424]

Answer:

ok, te ayudaré

94÷4=23.5

535÷5=107

76÷3=25.33333333333

829÷4=207.25

26÷9=2.8888888889

569÷8=71.125

97÷9=10.7777777778

527÷3=175.6666666667

25÷4=6.25

534÷9=59.3333333333

58÷6=9.6666666667

37÷5=7.4

49÷2=24.5

156÷6=26

I hope it serves you, give me a crown please

7 0

2 years ago