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3 years ago

Answer please I am in need of help

Mathematics

1 answer:

lions [1.4K]3 years ago

3 0

Answer:

Keep the bases and add the exponents then multiply by -1 is the correct answer

Step-by-step explanation:

You might be interested in

En un día de temporal de lluvia el meteorólogo dijo en las noticias que la probabilidad de que lloviera ese día era del 70%. ¿Qu

drek231 [11]

Answer:

Vamos a definir:

100% probabilidad de lluvia = Es seguro que ese día va a llover.

0% probabilidad de lluvia = Es seguro que ese día no va a llover.

Ahora, los valores intermedios admiten una dualidad, es decir, es posible que llueva o que no.

Particularmente en el caso del 70% significa que:

Si tenemos un dado de 10 caras, con los números {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

Y lo tiráramos, los resultados {1, 2, 3, 4, 5, 6, 7} indicarían que llueve.

Los resultados {8, 9, 10} indicarían que no llueve.

Entonces es mas probable que llueva, pero la probabilidad de que no llueva no es despreciable.

5 0

3 years ago

Suppose the population standard deviation is σ = 5 , an SRS of n = 100 is obtained, and the confidence level is chosen to be 98%

beks73 [17]

Answer:

1.165.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.98}{2} = 0.01$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.01 = 0.99$ , so $z = 2.33$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

In this problem, we have that:

$\sigma = 5, n = 100$ . So

$M = z*\frac{\sigma}{\sqrt{n}}$

$M = 2.33*\frac{5}{\sqrt{100}} = 1.165$

So the correct answer is:

1.165.

6 0

3 years ago

In a bouquet of flowers, there are 4 daisies and 11 roses. Write the ratio of daisies to roses in three different ways.

Dominik [7]

The ratio of daisies to roses is.36:1

3 0

3 years ago

Read 2 more answers

Work out the size of the angle marked x.<br> x<br> 145

dedylja [7]

Answer:

x = 125°

Step-by-step explanation:

The sum of the angles around a point = 360° , then

90 + 145 + x = 360°

235° + x = 360° ( subtract 235° from both sides )

x = 125°

5 0

2 years ago

There were 11 friends attending a party, Gifts for the boys cost $1 while gifts for the girls cost $2.

Alex17521 [72]

Answer:

7 girl gifts and 4 boy gifts

Step-by-step explanation:

7 girls gifts = $14
4 boy = $4
total = 18

4 0

2 years ago

Answer please I am in need of help​

Answer please I am in need of help