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3 years ago

Please answer Question 20

Mathematics

1 answer:

Sladkaya [172]3 years ago

8 0

Answer:

Perimeter = 20m

Area = 25m

If you want a good explanation please comment on this, I am at middle school and I have to go.

Step-by-step explanation:

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Two containers hold several balls. Once a second, one of the balls is chosen at random and switched to the other container. Afte

natka813 [3]

Answer:

(a) 8 balls

(b) 4 balls

Step-by-step explanation:

Let

$N \to$ Number of balls

For a box, the probability that there are N balls in it is:

$Pr = 0.5^N$

For 2 boxes, it is:

$Pr = 2 * 0.5^N$

From the question, we have:

$\frac{80}{10000} \to$ Favorable outcome

To solve for N, we have:

$2 * 0.5^N = \frac{80}{10000}$

$2 * 0.5^N = 0.008$

Divide both sides by 2

$0.5^N = 0.004$

Take log of both sides

$\log(0.5^N) = \log(0.004)$

Apply law of logarithm

$N\log(0.5) = \log(0.004)$

Make N the subject

$N = \frac{\log(0.004)}{\log(0.5)}$

$N =7.966$

Approximate

$N = 8$

Solving (b): Balls in one of the two boxes.

Here, we assume that each ball will have almost the same number of balls at a given instance;

Hence, we have:

$Balls \approx \frac{N}{2}$

$Balls \approx \frac{8}{2}$

$Balls \approx 4$

<em>4 balls in each box</em>

6 0

2 years ago

1/4 DIVIDED BY 1/2 = ? <br> CHECK BY MULTIPLYING

Llana [10]

Answer:

1/2

Step-by-step explanation:

1/4÷1/2

1/4*2/1

2/4

1/2

Points to remember:if u change dividion sign into multiplication sign do it's reciprocal.

8 0

2 years ago

Read 2 more answers

5 lbs equals how many ounces

fredd [130]

5 pounds = 80 ounces

7 0

3 years ago

In a (blank) , one ratio compares a part to a whole

cluponka [151]

I think it is a rate?

3 0

2 years ago

The Rodriquez family is donating

laiz [17]

Subtract the blue caps:

25-11 = 14 caps are either white or green.

Let green = X

white = X +2

Green + white = 14:

x + x +2 = 14

Combine like terms:

2x +2 = 14

Subtract 2 from both sides:

2x = 12

Divide both sides by 2:

x = 6

There are 11 blue caps, 6 green caps and 8 white caps.

5 0

3 years ago