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natka813 [3]
2 years ago
7

5th Grade Science Very Easy plz help me :3 NO LINKS

Mathematics
2 answers:
givi [52]2 years ago
3 0

Answer:

rubbing it against your hair it causes friction and with friction comes energy

AveGali [126]2 years ago
3 0
C. Rubbing the balloon against your hair can cause electric charge
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Please help me if you know answer
BartSMP [9]

Answer:

the answer would be 36,57,87 because it has to be equal to 180

and its an acute angle  

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
A researcher has two percentages and wants to know if the percentages are statistically different. The researcher calculates the
love history [14]

Answer:

p_v =2*P(Z>4.21) =2.55x10^{-5}

And we can use the following excel code to find it:"=2*(1-NORM.DIST(4.21,0,1,TRUE)) "

With the p value obtained and using the significance level assumed for example\alpha=0.05 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the percentage 1 is significantly different from the percentage 2.

D) Are statistically different.

Step-by-step explanation:

The system of hypothesis on this case are:  

Null hypothesis: \mu_1 = \mu_2  

Alternative hypothesis: \mu_1 \neq \mu_2  

Or equivalently:  

Null hypothesis: \mu_1 - \mu_2 = 0  

Alternative hypothesis: \mu_1 -\mu_2\neq 0  

Where \mu_1 and \mu_2 represent the percentages that we want to test on this case.

The statistic calculated is on this case was Z=4.21. Since we are conducting a two tailed test the p value can be founded on this way.

p_v =2*P(Z>4.21) =2.55x10^{-5}

And we can use the following excel code to find it:"=2*(1-NORM.DIST(4.21,0,1,TRUE)) "

With the p value obtained and using the significance level assumed for example\alpha=0.05 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the percentage 1 is significantly different from the percentage 2.

And the best option on this case would be:

 D) Are statistically different.

4 0
3 years ago
Find the missing side length
worty [1.4K]
Option b 10.44 ...........
7 0
3 years ago
Choose any four consecutive even numbers. (For example: 6, 8, 10, 12). Multiply the two middle numbers together. (e.g. 8 x 10 =
Ludmilka [50]

Answer:

Step-by-step explanation:

let the consecutive even numbers be  2n-2,2n,2n+2,2n+4 where n>0 and n is an integer.

2n(2n+2)-(2n-2)(2n+4)

=4n²+4n-(4n²+8n-4n-8)

=4n²+4n-4n²-8n+4n+8

=8

6 0
3 years ago
70 million 16 thousand 90
ladessa [460]

Answer:

70,016,090

Step-by-step explanation:

You write it in standard form.

8 0
3 years ago
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