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3 years ago

13

I need help with this!!

1 answer:

mr Goodwill [35]3 years ago

6 0

2 out of 5

Good luck on ur test

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2. TOYS A playground ball has a radius of

dalvyx [7]

Answer:

1767.1 inches cubed

Step-by-step explanation:

The volume of a ball, or a sphere, is: $V=\frac{4}{3} \pi r^3$ , where r is the radius.

Here, the radius is r = 7.5. So, plug in this value: $V=\frac{4}{3} \pi *(7.5)^3=562.5\pi$

562.5 pi is about 1767.1 inches cubed.

Thus, the volume is 1767.1 inches cubed.

Hope this helps!

6 0

3 years ago

Read 2 more answers

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

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

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

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

b)

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

3 years ago

I need help with this please...

Sindrei [870]

Answer:

Try (8, 2) and (12, 3)

You can find certain points on the g and just divide by 2.

7 0

3 years ago

Read 2 more answers

Pls explain me i will make u as brainlist

Mashutka [201]

Answer:

hope this help you

have a great day

4 0

3 years ago

If the answer is correct you get brainly

yarga [219]

Answer:

the answer is 2,800.

Step-by-step explanation:

5x5x2x7x8=2,800.

7 0

3 years ago