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3 years ago

How many square feet is Syria??????

Mathematics

2 answers:

serg [7]3 years ago

6 0

1993305600000 Square Feet

Aleksandr-060686 [28]3 years ago

4 0

71,500 square miles or 185,180km^2

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If you have a four digit code, where each digit can be any number from 0-9, what is the total number of possible four digit code

Aleksandr [31]

Exactly 10,000 it’s hard to explain though it’s really complicated

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3 years ago

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Identify the type of arc.

Fudgin [204]

Answer:

Do you have a picture?

Step-by-step explanation:

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3 years ago

Consider the following hypothesis test. : : The following results are for two independent samples taken from two populations. Ex

I am Lyosha [343]

Answer:

$z = -1.53$ --- test statistic

$p = 0.1260$ --- p value

Conclusion: Fail to reject the null hypothesis.

Step-by-step explanation:

Given

$n_1 = 80$ $\bar x_1= 104$ $\sigma_1 = 8.4$

$n_2 = 70$ $\bar x_2 = 106$ $\sigma_2 = 7.6$

$H_o: \mu_1 - \mu_2 = 0$ --- Null hypothesis

$H_a: \mu_1 - \mu_2 \ne 0$ ---- Alternate hypothesis

$\alpha = 0.05$

Solving (a): The test statistic

This is calculated as:

$z = \frac{\bar x_1 - \bar x_2}{\sqrt{\frac{\sigma_1^2}{n_1} + \frac{\sigma_2^2}{n_2} }}$

So, we have:

$z = \frac{104 - 106}{\sqrt{\frac{8.4^2}{80} + \frac{7.6^2}{70} }}$

$z = \frac{104 - 106}{\sqrt{\frac{70.56}{80} + \frac{57.76}{70}}}$

$z = \frac{-2}{\sqrt{0.8820 + 0.8251}}$

$z = \frac{-2}{\sqrt{1.7071}}$

$z = \frac{-2}{1.3066}$

$z = -1.53$

Solving (b): The p value

This is calculated as:

$p = 2 * P(Z < z)$

So, we have:

$p = 2 * P(Z < -1.53)$

Look up the z probability in the z score table. So, the expression becomes

$p = 2 * 0.0630$

$p = 0.1260$

Solving (c): With $\alpha = 0.05$ , what is the conclusion based on the p value

We have:

$\alpha = 0.05$

In (b), we have:

$p = 0.1260$

By comparison:

$p > \alpha$

i.e.

$0.1260 > 0.05$

So, we fail to reject the null hypothesis.

4 0

3 years ago

A rubber ball is thrown 16m into the air. The ball falls, rebounds to half its previous

dexar [7]

Answer:

63 m

Step-by-step explanation:

The first time:

16 m up and 16 m down = 32 m

The second time and each time after, half of the previous distance

This is a GP with the first 6 terms:

32, 16, 8, 4, 2, 1

Sum of the distances:

32 + 16 + 8 + 4 + 2 + 1 = 63 m

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3 years ago

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Find the number of 4 digit numbers with no repeated digits.

solong [7]

1209 I pick that number because it had no repeated digits

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3 years ago